Coyote Automatic Tire Deflators are the easy way to automatically deflate your tires to a precise pressure for any off highway terrain. They take all of the work out of accurately airing down. No more over or under pressure. Simply screw them onto any tire valve stem, pull the manual start ring if needed and it immediately starts deflating to your preset destination pressure* and then automatically shut OFF at exactly that pressure. Coyote Automatic Tire Deflators come in sets of 4 deflators, a carrying case and easy to follow Quick Set instructions. If you are looking for a simple way to deflate AND inflate, check out our Multi Tire Hose Kits! PART NUMBER: CEDV2, destination pressure* range from 8 to 65 PSI UPC: 741360607149 DEFLATOR SIZE: 3/4"(19 mm) diameter X 1.5"(38 mm) long DEFLATOR WEIGHT EACH: 0.9 ounce (25 grams) STORAGE CASE SIZE: 4 1/2 (114 mm) wide X 2 1/2"(64 mm) tall X 1" (25 mm) thick SHIPPING WEIGHT: 6 ounces (170 grams) SHIPPING SIZE: 7 1/2 (19 cm) X 9 (23 cm) X 1 (2.54 cm) 1-2 set orders ship via US First Class Mail *DESTINATION PRESSURE The pressure you have set at which the deflator automatically shuts OFF.