uxcell 5 Pcs 500K ohm B500K Top Adjustment Single Linear Potentiometers Product Name : Potentiometer;Resistance Value : 500K ohm;Power : 1/2W Adjustment Type : Top Adjustment;Type : Single Linear (Type B);Features : Knurled Shaft Shaft Diameter : 6mm / 0.23";Shaft Length : 13mm / 0.51";Mounting Hole : 7.5mm / 0.29" Base Height : 7mm / 0.27";Base Diameter : 16mm / 0.62";Material : Metal w Electronic Parts Color : As Picture Show;Weight : 36g;Package : 5 x Potentiometers