Penn Elcom W9000-V6 Swivel Caster for Heavy Duty Roadcases, Flightcases, and Heavy Equipment, 100mm/3.94-Inch Wheel High quality design and construction, with 100mm / 3.94" blue wheel Great for countless applications where heavy items and materials need to be mobile Ideal for flight cases, road cases and tour equipment 250Kg / 551.16 lb. load rating per wheel; Works with Penn Elcom caster plates (W0094) and universal wheel plates (W8980) Sold individually