Description 7 Rail National Box End Gate is the box end version of our most popular 7 railed gate has now been upgraded to include RHS bracing. Available from stock in a full range of sizes. Top and bottom rails 44.5mm o/d tube Intermediate rails 30mm o/dtube 1143mm high Spring loaded sliding bolt fastening or optional D Loop 50mm x 50mm SHS (Sleeved Hanging Stile)