Material: High Quality Steel/Hard plastic (Roller wheel). It will fit diameter 1'' rail. The price above is for one roller with 4 screws , if you need other parts please check the link below. The item "Satin Stainless Steel Interior Sliding Barn Wood Door Roller Hardware Spare Part" is in sale since Monday, September 19, 2016. This item is in the category "Home & Garden\Home Improvement\Building & Hardware\Doors & Door Hardware\Other Door Hardware".The seller is "tmshelmet" and is located in La Verne, California. This item can be shipped worldwide.