Select from DSL Supply inventory of adapters, acme, & filler connectors, in the gas products category. Discover quality products from brands like Marshall Excelsior Company. Purchase high-quality POL fittings & adapters, as well as fillers & transfer connectors that make filling propane cylinders quick and easy. Shop other parts like durable tee blocks, QCC connectors, and acme couplings. We also carry other products in the specialty parts category, such as tubing, tailpieces, replacement O-rings, and more.