Material: SteelFinish: Zinc PlatedSafe Work Load: 225 lbs. Per HangerQuantity: One PairFor Use With #5116 Box RailDesigned For Use On Box Rail With Wood-Frame Sliding Doors From 1-1/2" To 2" ThickPacked With 2 End Caps And Bolts For Attaching Door StrapIncludes 2 #51F Single Box Rail Brackets And 1 #51G Single Splice Box Rail BracketAdjustable Both Laterally And VerticallySelf Lubricating Delrin BearingsComes With Mounting Hardware And Instructions