Normcore Step-Down Filter Basket Kit Description

The Normcore Step-Down Filter Basket Kit is a precision-engineered conversion system designed to reduce your brew diameter and intentionally reshape espresso extraction behaviour. By stepping down to a smaller basket format, it increases puck depth and alters resistance, giving you structured control over flow dynamics, pressure response and texture development.

Available in 58mm → 49mm, 57.5mm → 49mm and 54mm → 45.5mm configurations, each kit is offered in either Reduced Flow (0.18mm, 2475 holes) or Standard Flow (0.28mm, 786 holes). Reduced Flow increases resistance for slower extraction and heavier body, while Standard Flow supports faster flow and greater clarity when paired with finer grind adjustments.

Engineered for deliberate dial-in refinement, this system allows controlled experimentation with grind size, dose depth and saturation behaviour without altering your machine setup. It creates a repeatable extraction platform that rewards precision, making it ideal for testing roast profiles and refining espresso structure with measurable intent.

Normcore Step-Down Filter Basket Kit Features

Reduced Brew Diameter System – Converts your existing portafilter to a smaller extraction surface, increasing puck depth and modifying resistance for controlled flow behaviour.

Low-Flow Configuration – Higher resistance supports coarser grind settings and slower extraction, producing thicker body and heavier texture for medium to dark roasts and alternative brewing styles.

Standard-Flow Configuration – Lower resistance promotes faster flow and greater clarity, requiring finer grind adjustments for light roasts and traditional espresso profiles.

Precision Laser-Cut Hole Pattern – Uniform perforation design ensures even water distribution and stable puck saturation across the reduced diameter.

Integrated Workflow Accessories – Includes matched dosing funnel, 0.8mm puck screen and filter papers to maintain surface control and consistency.

Durable Stainless Steel Construction – Engineered for repeated high-pressure use while maintaining structural integrity and consistent performance.

This Product Includes

1 x Normcore Step-Down Filter Basket
1 x Dosing Funnel
1 x 0.8mm Puck Screen
1 x Spring
200 x Paper Filters

Specifications

Materials
Stainless Steel

Flow Options

Reduced Flow – 0.18mm Hole Diameter, 2475 holes
Standard Flow – 0.28mm Hole Diameter, 786 holes

Compatibility
Bottomless Portafilter Only; Not for Spouted or Pressurised

Dimensions

58mm → 49mm
Outer Diameter (Top Lip) - 70mm
Internal Top Diameter - 59mm
Internal Brew Diameter - 49mm
Basket Height - 40mm
Lower Base Width - 50mm

54mm → 45.5mm
Outer Diameter (Top Lip) - 62mm
Internal Top Diameter - 54mm
Internal Brew Diameter - 45.65mm
Basket Height - 45mm
Lower Base Width - 46.6mm