Sea Dog Resettable Circuit BreakersSea Dog resettable inline circuit breakers with manual reset button are for use with higher amperage accessories. Ignition protected, these breakers are safe to install aboard gasoline powered boats. Constructed of injection molded nylon and polycarbonate with stamped brass #10-32 studs with nuts.The copper post is the battery or power in post; the silver post is the auxiliary or power out, protected post.Features: Splash proof; Available in 20, 30, 40, and 50 Amp; Complies with Standard SAE J553 and SAE J1171 (Ignition Protected).; May be used on 12 volt or 24 volt systems.; Dimensions: A: 1-5/16"; B: 1-7/16"; C: 1-3/8"; D: 7/8";