Carsun provides a variety of support frames of different specifications, which are basically suitable for the commonly used caster size and installation height. Carsun provides a complete set of simple support frames for installation, which can fix the mobile equipment at any time by bolting or welding at the bottom of the mobile equipment. The built-in spring not only keeps your foot firmly on the floor, but also protects your foot from being damaged when you step on it for a long time. If you want to move the equipment again, just step on the recovery rod gently, and the whole support frame can be up and down to restore the original state. The equipment can move freely without the help of manpower to lift it up and off the ground. MODEL NO. Extended Height (mm) Retracted Height (mm) Size Weight (kg) Bolt Hole size (mm) FL5040 151 125 4" 2.0 11 FL5050 172 146 5" 2.0 11 FL5060 198 158 6" 2.0 11 FL5080 248 208 8" 2.0 11