The Mr. Heater Propane "Steak Saver" Adapter earns its name when the bulk tank on your grill runs out, this handy adapter easily lets you connect to a 1-lb. bottle or distribution post to save that steak! Featuring two 1" threads on either end: one side is a 20 female throwaway cylinder thread, and the other side is a female propane operating line and Acme thread to connect to your grill. With its solid brass construction, it sports a brass nipple to open the safety valve in male throwaway cylinders, and a rubber gasket provides airtight sealing. Size: 1". Weight: 1 lb.