The powerblock set dust cover designed and assembled in the usa the power block brand has been the world s leading adjustable dumbbell since 1993 cover your power block dumbells after each workout to keep them clean and dust free suitable to cover all power block dumbbells except for the flex u 90 club set or the sport 9 0 set at stage iii this cover can be used on the following products power block sport tube stand power block sport column stand for sport 2 4 or 5 0 power block column s