The Genuine Briggs & Stratton Main Jet, model 690862, is a high-quality replacement engine part designed specifically for lawn mowers. With a compact size of 4.00 x 4.00 x 0.25 inches and a weight of 0.01 lbs, this main jet is easy to handle and install, ensuring optimal performance for your lawn mower engine. Manufactured by Briggs & Stratton, a trusted brand known for producing reliable outdoor power equipment, this OEM product guarantees durability and efficiency in maintaining your lawn.