Magnet D (Built-in) Mounting B (Basic Style) Style A (Non-lube Air Cushion) Bore Size 32mm Thread Rc (M5 for Air Cushion 20 & 25 Bore) Seal Material R (NBR) Stroke 50 Auto Switch None 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)