1-pound Grill Adapter with Coleman 16.4oz Camping Propane Fuel Cylinder Attaches to your grill and a 1-lb. propane cylinder. Cylinder Included. Features POL fittings and QCC1 connections When your bulk propane tank runs out of gas, attach the Coleman 1-Pound Grill Adapter to your grill and a 1-pound propane cylinder, and continue coooking. The Grill Adapter features POL fittings and QCC1 connections