for Toro Tractors, Lawn Mowers like Commercial Mowers & Z - Master Fit a fuel gas cap designed for select commercial mowers & Z-Masters, specifically compatible with Toro lawn mowers. This fuel cap replaces the part numbered 88 - 3990. It comes with an excellent seal, using a thick plastic seal to ensure a strong and leak-proof connection, keeping the fuel supplied properly. being more anti - oxidation. It's durable, not easily damaged during long - term use, thus extending service life and cutting maintenance costs. Additionally, it's easy to install as a direct replacement, like a plug - and - play item for your Toro snowblower or lawn mower, such as the Toro - Part - 88 - 3980 and 88 - 3980 models, making it an ideal choice