Magnet None Mounting B (Basic Style) Style N (Non-lube Rubber Bumper) Bore Size 50mm Thread TF (M5 for Rubber Bumper 20 & 25 Bore) Seal Material V (FKM) Stroke 250 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)