NcStar Pressure Switch for Red Lasers (ALWS) Coil Pressure Switch compatible with APRLS, APLS, ARLS, ACLS, and APFLS Aluminum Construction; Black Anaodized finish Maximum Length: 31.0" Weight .3 ounces N.W(Oz.): 0.30 We are an authorized NcStar dealer. Our list prices are the actual MSRP. Lifetime limited warranty Height(Inch): 6.0-20.0