Magnet: Built-in, Mounting: Basic, Bore Size: 1 1/2", Stroke: 4", Option: Both Ends (Air Cushion), Adjustment Range: 0 to 2", Auto Switch: A54--Reed, DC Volt >5<24, AC Volt <200, LED, Lead Wire or Prewired Connector: 3m, Number: 2 pcs. (Or None in the Case of No Switch), X Option: Adjustable Stroke, Extension Type, Speed Control Type: Universal, Applicable Tubing: 1/4", Suffix: Required