Stens 125-404 Gas Cap Replaces Toro 88-3980 Husqvarna 539 10 61-88 Simplicity 1715917SM Ariens 03859100 Toro 109-0346 Exmark 109-0346 John Deere RE216842 Cub Cadet 951-3124D Inside Diameter 3-1/4-inch CARB approved tethered cap Not compatible with greater than 10& ethanol fuel