PEEK is the material. Colour is another detail.

PEEK stands for polyetheretherketone. It is a semi-crystalline thermoplastic used in engineering plastics.

Milk white, beige and black are colour descriptions from particular products. Colour alone does not identify a resin grade, supplier or filler.

PEI is a different polymer. Keep the two names separate when comparing finishes, parts and editions.

POPO: milk-white PEEK and ripple textures

Look closer ↗

KAIS introduced PEEK and PEI versions together in June 2025. The PEEK version used a milk-white colour, with curved faces and ripple patterns on both sides.

The release listed PEEK Stepped and PEEK Dense configurations. KAIS described the feel of PEEK as more cushioned and PEI as crisper. Those are the maker's descriptions of these configurations.

The fine blasted finish mentioned in the same announcement applies to PEI. That finish was specified at 320 grit.

KAIS also noted that this milk-white PEEK could have tiny blemishes visible on close inspection.

CHOC: a PEEK core inside stonewashed steel

Look closer ↗

LAUTIE's February 2025 PEEK CHOC keeps a stonewashed stainless steel shell. The new PEEK core sits inside it, so the edition name does not mean every part is PEEK.

The diagonal engraving added to the base belongs to the outer shell.

LAUTIE offered the PEEK core separately and said it fitted the original CHOC. That compatibility statement covers the original model; other generations and accessories need their own fit information.

EXOSKELETON: the name does not specify the material

Look closer ↗

WANWU's May 2025 announcement introduced the beige PEEK EXOSKELETON. Its open frame makes the pale material easy to see.

The described factory configuration also included white POM balls and silicon nitride spring-loaded balls. PEEK does not describe every small part inside.

WANWU described interchangeable tracks and magnetic balls as ways to change the feedback. Those parts help explain why two setups of the same slider may feel different.

TOP-E: a weight tied to one release

MetalToys-Dz listed a PEEK TOP-E in March 2024. Its advertised product weight was 19.2 g.

The inner-board field was labelled "PEEK-3MM Dense Board". The announcement does not explain what 3MM measures, so it should not be read as a confirmed thickness, ball diameter or spacing.

The weight belongs to the complete listed product. A different size, mechanism or combination of materials needs its own weight figure.

Black PEEK: colour does not tell you the filler

BidRush EDC's August 2025 description of the Jiezou Hezi slider assigns imported black PEEK mixed with ceramic powder to the slider's middle plate. That is a specific component and a filled formulation.

The description does not identify the resin grade, supplier or filler proportion. "Imported" remains the publisher's origin claim.

Ensinger also offers unfilled black PEEK. A black surface alone cannot establish whether ceramic or another filler has been added.

Compare the part and the configuration

POPO shows PEEK as a surface you hold; CHOC uses it as an internal core. EXOSKELETON adds interchangeable tracks and balls to the comparison.

For feel, compare the model, contact parts and track setup before relying on a maker's description or a test. A resin's heat or wear data is not a cleaning or heating instruction for an assembled fidget with magnets, springs and other materials.