This is a Boat Trailer Jack replacement wheel by Stoltz. It Fits standard 2 inch wide caster on most boat trailer jacks using the same bolt and sleeve as your original jack wheel. This Poly Jack Wheel Offers all the benefits of a Stoltz roller, but in a wheel for your jack. If you have a familiarity with Stoltz Brand products, you know they are guaranteed to outlast any other product on the market. This Product is no different, now available to replace your broken wheel on your Boat Trailer Jack. This stoltz poly replacement jack wheel is designed to replace your existing 2 inch x 6 inch boat trailer jack wheel. Guaranteed to outlast any other roller on the marketNEW U.V. stabilized formula will maintain its color much longerLab tests have proven that Polyurethane has much better cut and abrasion resistance than PVCWill not mark your boatWon't flat spotExtremely cut resistantMade in the USA