OSE Parallel Harness with 10 gauge wire for use with ose-qs6p bullet connectors. Using this will allow use of two batteries to double the system MAH but the voltage will be the same. Made with 6mm bullet connectors with red nylon housing. The included red nylon housing helps stop short circuits. Includes: Everything in the picture. Note:Because runtime is doubled, its important to monitor heat buildup in the motor, esc and batteries. You must use two battery packs of the same exact specifications, age and quality. Failure to due so could cause a fire.