Black-er Industiral Swivel caster with total brake 1.Housing:made of pressed steel,zinc plated,double ball bearing swivel head with total brake,wheel axle with nut. 2.Material of wheel:rubber wheel , metal rim Available sizes: model numberwheel size (mm) load capacity (kg) overall height (mm) plate demension (mm) setting pitch (mm) hole dia (mm) I15-75-xxx75*225010582*6664*46.613*8.5I15-100-xxx100*2770128102*8483*6013*8.5I15-125-xxx125*34100152102*8483*6013*8.5*Please contact us if you have any questions about our available sizes.