ATV PowerLip Chain Roller. 
Model specific single roller. (Not a pair)
Upper location. 

Suitable for all types of riding.
Friction reducing additives and UV protection to eliminate color fade.
Sealed bearing is ABEC & 9002 ISO rated for superior rolling and long life.
New specific fit hardware is included.
Used by championship winning race teams worldwide.
Made in the USA.

Fits models below:
HONDA (86-89) TRX 250R  Upper
HONDA (85-87) ATC 250R  Lower or Upper
HONDA (93-11) TRX 300EX  Lower
HONDA (99-08) TRX 400EX  Lower
HONDA (09-14) TRX 400X    Lower