Prime-Line B 518 Roller Assembly, 1'' Dia x 1/4'' W Roller, Plastic/Steel, 2-PK BRAND NEW! THE PACKING WAS OPENED AND INSPECTED. This Prime-Line B 518 Roller Assembly is the perfect addition to any sliding door. The 1'' diameter and 1/4'' width make it a versatile option for any door, while the plastic and steel construction ensure durability and longevity. With a set of two rollers, this assembly is easy to install and provides smooth operation for your door. Whether you're looking to upgrade an existing roller assembly or replace a damaged one, this Prime-Line B 518 Roller Assembly is the ideal solution. Used as top and bottom roller. Plastic wheel with center groove. 1-7/8 in L housing. Heat-treated, high-tension steel spring and #8-32 x 1-1/4 in Phillips pan head screw. Heat-treated high-tension steel spring Used as a top and bottom roller Bearing Type : Ball Spring Type : Straight Roller Edge Type : Concave Roller Width : 1/4 in Roller Diameter : 1 in Material : Plastic/Steel Color : Silver Finish : Unfinished Dimensions : 1-7/8 in L Suitable for : Patio and Sliding Screen Glass Doors Includes : (2) #8 to 32 x 1-1/4 in Phillips Pan Head Machine Screws Used as top and bottom roller Plastic wheel with center groove 1-7/8"L housing, heat treated, high tension steel spring, and No.8-32 x 1-1/4" Phillips pan head screw Spring tension Roller Diameter: 1" Roller Width: 1/4" Roller Edge Type: Concave Carded/2