Optronics 7 to 5 Way Adapter wLead Converts tow vehicle 7-way round blade connector to 5-way flat pin female connector With its 16 lead, this adapter cleanly and conveniently links vehicle wiring system to trailer wiring system The 7-way round plug fits RVs, most new trucks and SUVs, and other towing vehicles The cable provides ample length - 23 from plug-end to plug-end to connect the two vehicles without any extensions California Residents WARNING Cancer and Reproductive Harm - P65Warnings.ca.