Having the right spares on-hand when out diving can make or break a dive. Don't let a Malfunctioning BCD Over-Pressure Relief Valve (OPV)/Pull Dump Ruin a Day-of-Diving, always carry a spare. This Hollis OPV/Pull Dump can get you out of a bind when you really need it. Valve is a complete Kit with Vent Cap, Pull Cord with Knob, Spring-and-Relief Valve. Easy to Install and made from Durable Plastic and Rubber with Corrosion Resistant Metal Spring this OPV makes a great Save-a-Dive Kit Item. OPV is covered by a 12 month limited warranty and makes a great Save-a-Dive Kit item.