Special roller silent tip, ID 10 mm (XC-tungsten carbide tip)
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Black rubber with yellow plastic shell create the best special roller silent tip.
Insert: XC-tungsten carbide tip.
Tungsten carbide (WC) is a chemical compound containing powder forms of tungsten carbide and cobalt which are during a specific sintering process fused together into a dense "hard metal".
Tungsten carbide also known as widia is much stiffer than steel, so this XC tip is extremely durable.
ID is 10 mm.