5031. ST Blade Fuse Block w/out Cover - 12 Circuit w/ Negative Bus. Tin-plated copper buses and fuse clips give 30 Amperes rating per circuit. Accepts ATO and ATC fast acting blade fuses. WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.