Navico 4-Way Block for NMEA 2000 Networks [000-12612-001]4 Way Block for NMEA 2000 Networks Navico's 4 Way Block accessory for NMEA 2000 Networks should be used where multiple drop cables are required in close proximity to make a more cost effective and streamlined solution compared to installations that use multiple T connectors. Specifications: Connection Gender: Female Data Interface: NMEA 2000 NMEA 2000 Connectors: Tee Connectors Box Dimensions: 1"H x 3"W x 9"L WT: 0. 2 lbs UPC: 9420024146071