Don't always want to dive doubles, but your gear is set up for doubles? The Hollis Single Tank Adapter gives you the versatility of single cylinder use when you have a dual cylinder set up. All you need is the adapter, and this set of stainless-steel bolts with butterfly nuts which make installation and removal a breeze. Small parts can get misplaced or lost, so having a spare set of hardware can get you out of a bind in an emergency.

Bolt kit comes complete with a set (2 each) of the following: Carriage bolts 5/16"-18 x1.25", flat washers 5/16" .75" OD, lock washers 5/16" MD and wing nuts 5/16"-18. All components are stainless steel for durability and long life. Kit makes a great save-a-dive-kit item.