Features: 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 . Specification: 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 NewColor: As picture shownMaterial: SteelSteering: Directional castersGroove: V GrooveWheel diameter: 49mmSlot width: 19mmGroove depth: 10mmBase 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/ BracketNotice: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.