... machined plastic switch knob 2.Material: acrylic PMMA 3.Small trial orders accept 4.Complex ... shapes can be available 1. Precision acrylic turning switch ... knob ;2. Custom knobs can be realized in complex shapes;3. All ... Steel 316, 303, 304...Plastics:Nylon, POM, Acrylic, Delrin, ABS...You Supplied:Engineering drawings: DXF, IGS ...