Ark Design Bifold Barn Door Top-mounted Hardware Kit for 4 doorsOur bifold sliding barn door hardware kit has been tested & , and we are so confident in our hardware that we offer a 10 year support period. , . & We are proud to provide reliable bi fold barn door hardware kits built to last. The robust iron with a black coating ensures long lasting beauty. Excellent nylon roller and floor guide allow , while heavy duty industrial grade rails and hangers effortlessly support doors . Our bi folding barn door hardware