Magnet: Built-in, Mounting: Basic, Bore Size: 1 1/2", Stroke A: 8", Stroke B: 1", Auto Switch: B53--Reed, DC Volt >5 <24, LED, Lead Wire or Prewired Connector: 3m, Number: 2 pcs. (Or None in the Case of No Switch), Stroke Options: Dual Stroke, Double Rod