Aftermarket Part - Not Manufactured by Penn
Made by a machinist as per Alan Tani's specs. Stainless steel gear sleeve (98-60AT).
Recommend if you INTEND to exceed 8 pounds of drag (based on use in the 500 Jigmaster, but applies to any of the reels where you want to apply more drag than originally intended).
See Pennparts.com section on Conv. Photo Walk-Thrus for articles/notes by Alan Tani.