Upgrade your lawn mower with this 2-piece set of black carburetor diaphragms that replace Briggs and Stratton 272538 for 3-5 HP horizontal Pulsa-Jet engines. These diaphragms are essential exhaust and emissions accessories designed to enhance the performance of your lawn mower. Crafted with durable materials, they ensure reliable operation and extend the lifespan of your equipment. Keep your lawn mower running smoothly with this affordable replacement part. Measuring in US customary units, these diaphragms are easy to install and maintain.