24 in. Replacement QCC1 hose and regulator. If you have an older propane tank that still gets the job done, but the connection needs to be replaced, you'll need this hose from Grill Pro. It uses the POL standard, which is the oldest standard for propane and butane cylinders and consists of reverse (or left-handed) threads. The hose also has a regulator for proper flow rate and is 24 in L.