Product Name : Switch Carbon Potentiometer; Model : WH138 Technology : Carbon Composition Rated Power : 0.2W/0.1W; Resistance Value : 500K Ohm Shaft Diameter : 6mm / 0.24 inch; Shaft Length : 13.5mm / 0.53 inch Base Height : 12mm / 0.47 inch; Base Diameter : 24mm / 0.94 inch material: plastic + metal Color: as shown Weight: 192g WH138 Single Linear Switch Carbon Potentiometer. 3 Terminals, Switch Carbon Taper Potentiometer. Application: Adjust Timer, Speed, Temperature. Package Content: 12 x Switch Carbon Potentiometer Only the above package content, other products are not included. Note: Light reflection 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.