Stud Mount Insulating Booths - 2-Pack - RedQuickly and easily insulate conductive posts and studs.Features:. Press-fit design works with all 5/16" (M8) and 3/8" (M10) posts and studs. Ideal for ML-Series Remote Battery Switches, Solenoids & Automatic Charging Relays, battery terminals, power posts, bus bars, battery switches, and much more.. For use with insulated ring terminals and lugs only. Color: Red. Cable Size: All. 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.