This is the XS Scuba Voyager 5 Scuba Diving Regulator Bag Feaures: The circular shape is ideal for coiling your regulator hoses Inner diameter is a full 12 in. (30 cm) Attached D-rings will accommodate an optional shoulder strap (P/N BG915) Carrying handle Self-repairing nylon coiling zipper with dual zipper pulls Protect your regulator and instruments with this fully-padded Voyager 5 Regulator Bag. This is a quick and easy way to pull your regulator system out of your large roller bag and carry it aboard the airplane.