uxcell Round Plastic Threaded Mounted 32mm Dia Ball Lever Control Knob 4pcs Product Name : Threaded Ball Knob;Main Material : Plastic Color : Black;Diameter : 32mm / 1.2" Hole Diameter : 10mm/0.4";Thread Diameter : M8 Female Thread Weight : 56g Package Content : 4 x Threaded Ball Knob