Magnet D (Switch Unit) Mounting B (Basic) Standard Shaft Type W (Double Shaft with Single Flat) Angle Adjusting Unit None Size 20 Rotation Angle - Vane 180S (Angle: 180 Single Vane) Port Side Auto Switch No Switch Lead Wire or Prewired Connector 0.5m (Or None in the Case of No Switch) Number 2 pcs. (Or None in the Case of No Switch)