●✅ RELIABLE PERFORMANCE - 72mm 76mm 80mm Dia/Made of abrasion-resistant, high-density urethane material. ●✅ 72mm 76mm 80mm Dia/85A WHEELS - Extra-high upgrade value wheels. ●✅ (4) WHEELS PER SET - bearings and spacers NOT included. ●✅ MAXIMUM GRIP - Excellent vibration control. Specially formulated for OUTDOOR use and can also be used INDOOR. ●✅ The Perfect Combination of Hardness and Wear Resistance not only Ensures Comfort, but also Extends Service Life.