Autohelm ST50 Speed /Temp Transducer ST800
Compatible hull material: steel, alloy and fiberglass
Fixing: Thruhull 52mm
Cable: 45ft (14m) cable with 5 pin socket
Compatible with following ST50 and ST50+ Speed Instruments.
This is later 31mm diameter transducer so if you have older 40mm diameter transducer you have 2 choices
1. Fit new skin fitting supplied
OR
2. ST850 version which comes with valve sleeve that will fit your old 40mm ID skin fitting see eBay item number: 392404022955