Circa 1999 Shimano STX Outer 42t Mountain Bike Chainring, made in Japan.  NOS / New / Unmounted.  5 arm, 94/58mm bolt circle diameter, originally for model STX FC-MC34 crankset, but will work with any 94mm/58mm bolt circle diameter crankset.   For 7, 8 and 9 speed drivetrains.   Buyer to pay $6.00 USPS Ground Advantage shipping with tracking.  Buyers outside the Continental US to use Ebay's International Shipping service.  Thanks for looking!