Features: Especially lightweight, easy maintenance. Can ease the vibration, no noise and smooth operation. Made of steel material, water proof, corrosion resistance and have long life. High strength, good toughness, low creep, abrasion resistance and chemical stability. Adapt to a wide temperature range, can be used in the range of -40 -100 . Specification: Condiiton: 100% Brand New Color: As picture shown 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 Notice: Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. Please understand that colors may exist chromatic aberration as the different placement of pictures. Package List 1Especially lightweight, easy maintenance. 2Can ease the vibration, no noise and smooth operation. 3Made of steel material, water proof, corrosion resistance and have long life. 4High strength, good toughness, low creep, abrasion resistance and chemical stability. 5Adapt to a wide temperature range, can be used in the range of -40 -100 .