3/4 in. Rapid Seal ProPEX Expansion HeadThe Rapid Seal ProPEX Expansion Heads aid the fastest sealing times of ProPEX across changing temperatures. The expansion heads are precision engineered for accurate expansion of Uponor PEX tubing for ProPEX fittings. Featuring the auto rotation inter and face for Milwaukee Cordless ProPEX Expansion Tools, the heads are compatible with both M12 and M18 expanders. Made from high strength steel, the chrome plated segments and black oxide ring combine