4-Way Block for NMEA 2000 NetworksNavico's 4-Way Block accessory for NMEA 2000 Networks should be used wheremultiple drop-cables are required in close proximity to make a morecost-effective and streamlined solution compared to installations that usemultiple T-connectors. - cis2:mm5mnJlm -Specifications: Data Interface: NMEA 2000; Box Dimensions: 1"H x 3"W x 9"L WT: 0.2 lbs; UPC: 9420024146071;