Designed for Public Safety divers, these 18, 30 and 40 lb single cylinder wings boast all of the same features as the 18, 30 and 40 lb single cylinder wings listed above but have the following differences: Armoguard exterior provides added benefits More abrasion resistant than Cordura Fast-drying When it doesn't get rinsed, it won't smell or pick up bacterial growth The airway uses an 18" round spiral hose and has a rapid exhaust dump valve aka a cable pull dump Style Single Cylinder Wing - Donut Sizes 3 Inflator WTX "K" Style w/ brass buttons Airway 18" corrugated hose w/ rapid exhaust dump on top Dump valves 1 Flat Valve - lower left Harness Can be used w/ WTX or webbed harness Weight System Optional SureLock II Drains Central mesh panel 2 grommet Retractor option Yes Tank Stabilizer Bars Yes Exterior Material Armoguard slick skin Inner bladder 22 mil (.022) thick black urethane Zipper Heavy Duty YKK #10 Lift Capacity (lbs/N) WTX-D30 PSD Wing - 30 lbs Warranty Limited Lifetime