PHOENIX R2512-x4, Set of 4 - 8" Dia. Stainless Steel Baby Moon Hub Cap for Trailer, Dollies, Golf Cart, Lawn Mower, etc. Set of 4 - 8" Stainless Steel Baby Moon Hub Cap Used on Trailers, Dollies, Mowers, Golf Carts, etc. Fits 8" wheels (such as 4.80 x 8.00 and 5.70 x 8.00) Inside rim diameter is 7 7/8". Will not work on old vintage car and trailer wheels that have a 8" diameter moon in the middle. Those are not 8" wheels.