Smooth OperationCan ease the vibration, no noise and smooth operation. MaterialThe Sliding Gate Roller is made of steel material, water proof, corrosion resistance and have long life. Temperature RangeV Type Sliding Door Roller Wheel adapt to a wide temperature range, can be used in the range of -40 -100 . FeatureHigh strength, good toughness, low creep, abrasion resistance and chemical stability. Light weightEspecially lightweight, easy maintenance. Specification: Condiiton: 100% Brand New Material: Steel Steering: Directional casters Groove: V Groove Wheel diameter: 49mm Slot width: 19mm Groove depth: 10mm Base plate size: 38mm x 68 mm / 1.50" x 2.68" (appr.) Mounting distance: 24mm x 55mm / 0.94" x 2.17" (appr.) Package Included: 2 x Sliding Gate Roller Steel V Type Wheel w/ Bracket