Pulse Generator Sender - 7/8-18 ThreadFor use with tachometers or engine synchronizers designated as generator type.Features:Range - 10V AC at 1000 RPM, 4 Pulses / RevolutionCompatibility - Generator Type Tachs/SyncsThread - 7/8-18*Sold as an IndividualWARNING: This product can expose you to chemicals including LEAD 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.