Check the listing for details. Source Tactical Helix Bite Valve Coyote Modular High Flow Replacement Kit. Color: Coyote, Condition: New with tags. Listed at 19.99 USD. Source Tactical's exclusive Helix hydration valve design delivers high performance with minimal bite pressure. The new QMT valve tip offers the convenience of disconnecting the valve so the tube can be easily woven through tight openings. Helix Valve is compatible with Quick Mate Technology (QMT) such as UTA and other Source accessories. It features a 360 degree cylindrical valve with soft bite which eliminates the need for a specific mouth orientation. The retreat spring sealing mechanism is leak proof even under pressure. Features:Cylindrical shape requires no special mouth orientation.Bite valve - Unique mechanism delivers full flow with just a soft bite.Retreat spring mechanism - Will not leak even under pressure or with prolonged use.Build-in bayonet style shut off.Omni directional operation.Integral lock - Integrated twist shut-off.Long wearing design.Dirt Shield™ – Valve coverAngled valve