YOSTAR Yoyo Bearing Pack - KK Unresponsive Bearing + Narrow C Responsive Bearing + Bearing Remover + Short Axle (responsive) + Long Axle (unresponsive) + Responsive Silicone Pad

YOSTAR Yoyo Bearing Kit, Suitable for Crystal Yoyo K2 to Replace 2 Modes, with 2 Responsive Yoyo Bearing + 2 Unresponsive Yoyo Bearing + 2 8mm Axle + 2 10mm Axle + 8 Responsive Pad + Bearing Remover

YoYoFactory LONG SPIN OIL - Modern Yo-Yos Lubricant (long and silent spin, improves ball-bearing's lifetime)