Rainbow Store Universal Propane Refill Adapter for All 1 LB Tank Small Cylinders - 100% Solid Brass Valve with Safety Protection 100% high quality solid brass construction makes it corrosion resistant. Fits all 1 lb cylinder tanks and easily refill 1 lb bottles. Easy and quick manual installation, no tools needed. Built-in safety feature which restricts overflow, soft nose POL (rubber ring make it good seal). Safety & corrosion resistant - Provides secure and airtight connection and can be used in a variety of harsh outdoor environment.