Cole Hersee 48160 Battery Isolator Guard 200 Amp
For 12-36V DC negative ground electrical systems
200A max alternator rating
Battery isolators prevent the charge from flowing from one battery to another, and can be charged from one source.
Three 5/16" stud terminals.
Mounting: four 9/32" ( 7.14mm) diameter holes.
8 1/2L x 4 3/16"W x 3 13/32"H ( 215.0 x 122.2 x 86.5mm)