This is the Atomic Aquatics SS1 Adapter Kit (Includes all three available sizes) Features: Easily connect your SS1 to your inflator hose This kit includes all three sizes! A 1 size, a 3/4"-13/16" size, and a 11/16"- 3/4" size The hose adapter assembly kit is used to properly attach your SS1 to your inflator hose. One of these pieces will be able to adapt to your inflator hose. The SS1 can then be threaded onto the adapter. The SS1 can be removed from the BCD by simply unscrewing the adapter. This feature allows you to remove the SS1 for transport with your primary regulator, use on a second BCD, or keep safe in a regulator bag. To purchase the adapters individually by size, please see SKU acc1156.*IMPORTANT* It is strongly recommended that your professional retailer or scuba repair technician do the final installation and check of the SS1. It can be very dangerous if done incorrectly!