The1840201 410150-1 MKR-15 Transducer Mounting Kit is a versatile accessory designed to securely mount your trolling motor's transducer to the lower unit. Compatible with Minn Kota trolling motors featuring 3-1/4", 3-5/8", 4", and 4-1/2" lower unit diameters, 1840201mounting kit ensures optimal performance and accuracy for your fish finder. Constructed with durable materials, it provides a reliable solution for anglers seeking to enhance their on-the-water experience. With proper installation, this kit allows for seamless integration of your transducer, enabling you to locate fish and navigate underwater structures with precision