8" x 1-1/2" Shock Absorbing Plate Mount Swivel Caster with Brake - 770 Lbs. Capacity | 7M-GDS200BSF-KO8" x 1 1 2" Shock Absorbing Plate Mount Swivel Caster with Brake Part# 7M GDS200BSF KO *Part number with US Mounting Plate Option: 7M GDS200BSF US This heavy duty spring loaded caster is the premium shock absorbing caster available for loads requiring 500 pounds of capacity or less. Not only does it protect sensitive equipment from shock loads and vibration but it also reduces noise during transportation and has the ability to roll over obstructions.