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Nucleus

Nucleus Bloom Black With 15 Needles

Nucleus Bloom Black With 15 Needles

REFERENCE:  BT-Bloom

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HOW TO USE BLOOM?

BLOOM BY NUCLEUS

STOP UNEVEN EXTRACTION: HOW THE NUCLEUS BLOOM IMPROVES BREW BED PREPARATION

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Product Overview

Bloom Inconsistent extractions, uneven saturation, and choked brews can affect pour-over consistency. Bloom is designed to address these challenges by providing greater control over coffee bed preparation before brewing begins. In seconds, Bloom helps break up clumps, remove trapped air pockets, reduce static, lift chaff, and create a more even coffee bed. Faster Saturation, Smoother Flow De. . .

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Specifications & Details

Dimensions

• Length (Needles Retracted): 115 mm
• Length (Needles Extended): 160 mm
• Needle Length (Total): 67 mm
• Needle Length (Protruding from Bloom): 45.36 mm
• Flow Tip: 36.88 mm
• Width: 28.99 – 30.98 mm

Materials

• Body: Thermoplastic, aluminum, silicone

Approximate Weights

• Total (with needles): 45 g
• Total (without needles): 43 g
• Total packaging (with Bloom and spare needles): 191 g
• Spare needles: 8 g

Dual Needle System

• Two configurations: straight needle and fan needle
• Straight needles: ideal for conical brewers; reach deep to break up clumps and redistribute density
• Fan needles: ideal for flat-bed brewers; agitate the surface and lift chaff for even flow

Easy Twist and Retractable

• Simple twist mechanism to switch between modes
• Fully retractable for safe transport and storage

Customizable Needle Layout

• Configure up to 15 needles based on your preference

Purpose-Made Needles

• Up to 8× more durable than standard stainless steel
• Corrosion-resistant and low-friction
• Maintains shape and precision over time
• Sleek gold finish

Static Reduction

• Attracts and lifts fines and chaff for cleaner brews
• Reduces static after grinding for more even distribution
• Releases trapped air pockets to improve extraction consistency
• Enhances clarity of aroma, flavor, and texture

Flow Tip Indentation Tool

• Creates a central divot for consistent bed depth
• Encourages even saturation from the first pour
• Reduces trapped gases and turbulent bloom
• Minimizes channeling and improves repeatability
• Suitable for various pour styles and dripper types

Compact and Portable Design

• All-in-one body with retractable components
• Fits easily into travel kits, apron pockets, or drawers
• Durable for daily use in home, café, or competition settings

Modular and Customizable

• Adjustable needle configurations for different brewers or doses
• Disassemble internal components for maintenance
• Professional-grade construction
• Developed with world-class baristas and brewers
• Engineered for precision, performance, and reliability
• Designed to elevate brew quality across all preparation methods

About the Brand

NUCLEUS
Nucleus Tools was founded based on the vision of Sasa's Sectic infinite passion for the perfect cup of coffee. Who has won the 2015 World Barista Championship. Nucleus are passionate profess. . . read more
Nucleus Tools was founded based on the vision of Sasa's Sectic infinite passion for the perfect cup of coffee. Who has won the 2015 World Barista Championship. Nucleus are passionate professionals who care about providing quality products and supporting the speciality coffee industry with the latest and most exciting coffee innovations. read less

Is This For you

Perfect For

  • Coffee cupping
  • Aroma evaluation
  • Sensory training
  • Roasters and baristas
  • Sample coffee testing
  • Professional coffee labs
  • Improving aroma clarity
  • Specialty coffee education

Not Ideal For

  • Brewing coffee directly
  • Espresso preparation
  • Grinding coffee beans
  • Milk drink preparation
  • Daily drink serving
  • Travel coffee kits
  • Basic home coffee setups
  • Users needing a brewer or server
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Features

The Nucleus Bloom Black With 15 Needles is a precision brew bed preparation tool designed for pour-over coffee, home brewers, cafés, and competition use. It helps break clumps, reduce static, lift chaff, release trapped air pockets, and create an even coffee bed before brewing for cleaner, more consistent extraction.

  • Ideal for Pour-Over Bed Preparation

    Designed to improve coffee bed evenness before the first pour, helping reduce uneven saturation and channeling.

  • Dual Needle System

    Includes straight and fan needle options, making it suitable for both conical and flat-bed brewers.

  • Customizable 15-Needle Layout

    Allows users to adjust the needle setup based on brewing style, coffee density, and personal preference.

  • Retractable & Portable Design

    Compact twist mechanism keeps the needles protected, making it easy to carry, store, and use daily.

How it compares

Compare with other similar products

Feature

Brand

Main use

Best for

Needle system

Key benefit

Brew type

Nucleus Bloom Black With 15 Needles

Nucleus

Filter / pour-over bed preparation

Pour-over, drip, competition brewing

Retractable 15-needle design

Breaks clumps, reduces static, lifts chaff, evens coffee bed

Filter coffee focused

Subminimal Flick WDT

Subminimal

Espresso puck distribution

Home baristas, espresso workflow

Retractable needles

Compact, clean storage, easy puck stirring

Espresso focused

MHW-3Bomber WDT Tool

MHW-3Bomber

Espresso puck distribution

Budget-friendly espresso prep

Fixed fine needles

Affordable WDT for clump breaking

Espresso focused

Technical Specifications

Complete technical details and specifications

Dimensions

Length (Retracted): 115 mm
Length (Extended): 160 mm
Total Needle Length: 67 mm
Protruding Needle Length: 45.36 mm
Flow Tip Length: 36.88 mm
Width: 28.99–30.98 mm

Materials & Weight

Body Material: Thermoplastic, Aluminum, Silicone
Needle Material: Stainless Steel
Weight (with Needles): 45 g
Weight (without Needles): 43 g
Packaging Weight: 191 g
Spare Needles Weight: 8 g

Needle System

Needle Configuration: Straight & Fan Needles
Maximum Needle Capacity: Up to 15 Needles
Compatible Brewer Types: Conical & Flat-Bottom Brewers
Needle Design: Interchangeable & Customizable

Functional Features

Operation: Twist-to-Switch Mechanism
Storage: Fully Retractable Needles
Water Distribution: Integrated Flow Tip
Maintenance: Modular, Easy-to-Disassemble Design
Performance: Helps Reduce Channeling, Static, Trapped Air, Fines & Chaff
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