1.Custom machined plastic switch knob 2.Material: acrylic PMMA 3.Small trial orders ... delivery. Manufacturing:CNC Machining, Precision Machining, Turning, Milling, Drilling, Tapping...Soft Metals:Aluminum, Brass, Carbon Steel, Copper, Stainless Steel 316, 303 ... days for sample; 30 days for mass production. CNC turned plastic switch knob with acrylic PMMA