4 Pole 3 Position design, ceramic structure, easily turned. Comes with mounting nut and black plastic knob, no worry about knob size mismatching. Widely used on radio, TV, industrial machine control unit, or other digital devices. Product Name : Rotary Switch Material : Metal, Ceramics, Plastic Rotating Shaft Dia : 6mm / 0.24 inch Dimensions(knob not included) : 25 x 12mm / 1 inch x 0.47 inch(Max.D x H) Fit Mounting Hole Diameter : 9mm / 0.35 inch Pin Number : 16 Contact Type : 4 Pole 3 Position (4P3T), 2 Deck Net Weight : 39g Package Content : 3 x Rotary Switch Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.