Belt 397t (for long boom 295mm all-belt-drive). *****Special price due to bulk purchase******** 397 teeth (397mm long), same as Align replacement part HT1003 Industrial quality rubber, heavy duty, long lasting belt with excellent strength. Will not frey or snap. Will fit TREX 450 XL and 450 SE models, and less than half the price of original. Exellent replacement for stock, weaker TREX belts.