John Guest� Speedfit� Brass SuperThread Straight Adaptor 12mm x 3/8"BSP - Pack of 2. At Purevue we are committed to sourcing parts of OE quality or beyond, in order to ensure we will not let the customer down. Sealey are a renowned tools supplier to the aftermarket. Cross Reference: . We are committed to keeping our prices as low as possible, and protecting our customers with long guarantees. This product comes with free 30-day no quibble returns (UK only).