... accept 4.Complex shapes can be available 1. Precision acrylic turning switch knob ;2. Custom knobs can be realized in complex shapes ... Steel, Copper, Stainless Steel 316, 303, 304...Plastics:Nylon, POM, Acrylic, Delrin, ABS...You Supplied:Engineering drawings: DXF, IGS, STEP...Payment ... sample; 30 days for mass production. CNC turned plastic switch knob with acrylic PMMA