5/16" X 3/16" OD Reducing Brass Coupling - RDC516-316 Outer Diameter: 5/16" Outer Diameter: 3/16" MPN: RDC516-316 Product Code: RDC516-316 This is an online offer only for a Limited Time! Availability: In stock Only £4.27 incl VAT. Delivery available to UK/Europe |