Topball Ultimate from NB Corporation can carry four times the load and has 64 times the life of conventional slide bushings. It's new optimized load plate, outer cylinder structure and double the ball circuits of the standard TW type increase Topball Ultimate’s load ratings by 1.3 times and travel life by 2.2 times compared to the TW. The TW type has three times the load capacity and 27 times more travel life of conventional bushings.