1/2" X 5/16" OD Reducing Brass Coupling - RDC12-516 Outer Diameter: 1/2" Outer Diameter: 5/16" MPN: RDC12-516 Product Code: RDC12-516 This is an online offer only for a Limited Time! Availability: In stock Only £7.82 incl VAT. Delivery available to UK/Europe |