DIYHD MM20DBW 5FT White Coated Steel Sliding Barn Door Hardware with Black Bolts, Single kit Hardware Only,Not including Door Panel,Not including handle Material:Steel,POM;Surface:White hardware with black bolts Two rollers can bear MAX weight 90kgs,suitable for door thickness 40-45mm Package's including:roller*2pcs,stopper*2pcs,track*1pcs,track&wall connector*4pcs ,floor guide*1pcs Track had been pre-drilled 16" apart holes