5PCS/LOT 20 Position 360 Degree Rotary Encoder EC11 w Push Button 15mm Condition: Brand New/Sealed Description Base size: W -11.8mm x L - 13.7mm + 1.1mm(prongs) x H – 6.5mm Shaft size: 5mm (Threading half) + 12mm (Knob Half) M7X0.75