The Johnny Ray JR-1 Transducer Mount is constructed of aircraft-grade anodized aluminum, and is designed to allow for easy cone-angle adjustment to align the transducer to the lake bottom. The JR-1 mount offsets your transducer beside the motor unit. Shaft diameter is 1.000; offset distance is 2.000; overall length is 4.200; overall width is 2.550. Material thickness measures .093 with stainless hardware. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Transducer Mount.