Polyetheretherketone — a high-performance engineering polymer, typically tan, beige, or black, valued for strength and chemical resistance.
Density / weight impression
Around 1.3 g/cm³ — light, like PEI, with the same airy hand.
Machining behaviour
Machines well and tolerates heat and stress; a serious engineering plastic.
Surface behaviour
Usually matte; less translucent than PEI.
Feel in hand
Warm and soft like PEI, with a more opaque, utilitarian look.
Sound influence
Muted and dull.
Finish compatibility
Matte and as-machined, light polish.
Collector appeal
Niche — chosen for durability and a restrained, technical aesthetic rather than visual drama.
Common object types
Shells, sliders, structural parts.