1.: The gate wheel with spring is made of highquality steel nylon material, the surface is galvanized, rust, wearresistant and pressureresistant, strong stability, quiet, nonslip. 2.Shockabsorbing spring design: It consists of a highly elastic and deformation spring, which has a good shockabsorbing effect. The length of the spring is 0–30 mm/0–60 mm, allowing the height to be automatically adjusted on uneven ground while ensuring that the door can be opened and closed ly, reducing noise! 3.Heavyduty wheels: 5inch gate wheels are equipped with double bearings, which can rotate 360 degrees and are stable and easy to push. The springloaded gate wheel can automatically stretch and buffer, can solve the problem of uneven ground, and has the characteristics of impact resistance and shock absorption. 4.Applicable: It can be widely used in home and office equipment, communication equipment, ship assembly, and other machinery industries.