Shimano EW-JC304 Di2 SD300 4-Port Junction Box Water Shoes Ergonomically optimized stem and thumb

Ergonomically optimized stem and thumb loop for surgically precision placements

Combined with the Pro Grip goatskin leather palm

ID: 611363

The twist hand brake provides optimal speed control whether on pavements or hilly terrain

industrial marine

Shimano EW-JC304 Di2 SD300 4-Port Junction Box Water Shoes Ergonomically optimized stem and thumbThe 2nd generation Di2 e Tube wiring system from Shimano has the SD300 designation. These wires and connectors are thinner than the SD50 generation. if you need to join two wires to one (3 total wires), or two pairs of SD300 wires to create a longer length for both pairs (4 total wires), you will need this EW JC304 Di2 SD300 4 Port Junction Box. This is actually a simple looking dual tube connector with internal ports on both ends of each side that