Magnet D (Built-in) Mounting B (Basic Style) Style A (Non-lube Air Cushion) Bore Size 100mm Thread TF (M5 for Rubber Bumper 20 & 25 Bore) Seal Material R (NBR) Stroke 1200 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)