Copper Free Specification None Bore Size 50mm Port Thread Rc Piping G (Centralized Piping) Stroke 2000mm Stroke Adjusting Unit H (2 Shock Absorbers at Each Stk End) 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 or Prewired Connector)