Description Specifications Interchange Set of 8 EGT probes for Alcohol and Gas application for SC1000, Pro 1, Pro 1A, Pro 1B, Pro II, Pro III and Pro IIIA. Nuts and ferrules sold separately. RACEPAK,Sold as a set of 8 - sensor lengths are 9", 13", 18" and 23" RACEPAK, Package information Extended Package information Interchange Not Available