OSE 8.0mm Anti Spark Series Y Harness for use with ose-qs8-anti connectors. Using this will allow use of two batteries with the same ESC. Doubling the voltage to your esc/motor. Made with ose-qs8-anti with 8 gauge wire. Includes: Everything in the picture. Note: You must use two battery packs of the same exact specifications, age and quality. Failure to due so could cause a fire.