High QualityStainless steel stud screws, good rust resistance. Material: base material nylon + transparent PC cover. Product SpecificationsThe 7 positions bus bar electric terminal junction block's max rated AC voltage is 300V, max rated DC voltage is 48V, high current brass strip with max current rating of 150amps. Excellent Performance The 7 positions buss bar stud terminal adopts excellent manufacturing with stainless steel screws and nuts for enhancing its corrosion and rust resistance in the saltwater or corrosive environment, which has high reliability. Terminals Each battery distribution block includes - M6 terminal studs x 4 and M4 screw terminals x 3, suitable for 1/4" and #8 insulation ring terminals. Widely UseThese 12v bus bars are using copper plates and stainless steel terminals as conductors, which makes it can work in extreme environment, suitable for automotive, car, truck, marine, boat, yacht, etc.