Magnet D (Built-in) Mounting B (Through Hole (Standard)) Bore Size 20mm Piping Rc (or Metric) Stroke 20mm Action B (Double Acting/Spring Loaded) Rod End Round Bar Style 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)