Dormont Gas Quick-Connect Hoses are sold by the hose and also as a multi-part kit. Dormont Gas Hoses will include the Snap-Fast Coupler and the Blue Hose. The Dormont Blue Gas Hose has anti-microbial PVC Coating that inhibits the growth of bacteria, mold and mildew. The hose is made of stainless steel that is tightly woven and braided. The Dormont SnapFast Coupler has a thermal shut-off polymer inset that meets when internal temperatures exceed 350 degrees. Keep in mind, when purchasing the quick connect has hose, it does not come with the Restraining Device. However, the kits do include the Restraining Device. The Dormont Quick-Connect Gas Hose Kit includes all of the above with the Restraining Device, one gas ball valve and two each 90 degree street elbows and mounting hardware. A final note to remember is that all cooking equipment that are on casters for move-ability are mandated to have Quick Connect Gas hoses and must have Restraining Devices. The Restraining Device is mounted to the appliance and the wall. It tethers the appliance to the wall so that when one pulls the appliance out, the Restraining Device will keep it from being damaged.