Content: Motor Tube (High Durability Type) 10 pieces for Crystia CRS/AIR These are slightly thicker motor tubes for Crystia. Grip and durability are slightly improved. Recommended for those who experience spool slippage or who fish for large numbers. ※This is not an official product, so use is at your own risk. ※Compatible models: Crystia CRS series Crystia AIR Crystia CRT, CRT R series Operation has not been confirmed for previous models.