This item is used on multiple models.
pinion gear and 5-TRQ15
main gear are the gear pair that is factory installed into the Torque Star Drag family of reels providing a 6.0:1 gear ratio.
The 5-TRQ15 6.0:1 ratio main gear can only be used with the 13-TRQ15 6.0:1 ratio pinion gear. If the main gear or pinion gear needs changing, be very sure you are replacing with the correct ratio part. The wise thing to do if the pinion or main gear require replacing, would be to order both parts.