Shimano EP8 Internal 2-Port Junction

SD300 Connector
This Shimano female-female junction box allows two SD300 wires to be connected, increasing their length. Designed to give you greater flexibility when running wires on a larger frame or in tricky wiring cases, this Shimano EP8 Internal 2-Port Junction gives you the freedom to wire your bike your way. Specifications
. Compatible with SD300 wires