The Rollerblade TWINCAM ILQ-9 PRO (16PCS) bearings are engineered for optimal performance, featuring an exclusive six-ball bearing design. The S-Channel Rubber Shield (SCRS) system enables smoother rotation by allowing for a larger weight load and reducing empty space within the bearing. The bearings are lubricated with TK racing gel, made in the USA. The package includes 16 bearings, 8 spacers, and a convenient storage box.