3 mounting positions, for more adjustability Precise material selection for improved work of breathing Velcro shoulder strap for optimized positioning Diver selected OPV position (at time of order) "Full Kit" Includes: BMCL OPV Ported, low-profile T-pieces T-piece size options: 1.5 inch / 40mm hose (Defender, HammerHead, Prism 2, most Cooper hoses) 1.42 inch / 36mm hose (Megalodon) Optional: integrated T-piece ADV Threaded inlet adapters for T-pieces LP 90 degree adapters for T-pieces Oxy and Dil back mount manual addition valves "BMCL Only" Includes: BMCL OPV *NOTE* - Due to the many configuration options, LP feed hoses are NOT included. If you wish to purchase a BMCL hose kit, we have a few options HERE. *NOTE* - the Meg version is NOT designed to work with the factory Meg t-pieces. Our Meg sized t-pieces are designed to work with this BMCL and the factory Meg loop hoses.