Flair-It 16865 Tube Adapter, 1/2 x 7/8 in, PEX x Ballcock, Polyoxymethylene, White

Flair-It fittings are constructed of durable polyoxymethylene (POM) and are compatible with PEX and PB. The patented design consists of a nut and flared insert and requires no tools. The fittings push against the ID and OD of the pipe, creating a strong long-term seal.