SS1 Plastic - Maximum Connector diameter 21mm. Dimensions: 45 x 21mm. Tapered body and seal. The seal is split between outside and inside diameterto allow cable with a fixed connector to pass through the deck without the need to cut the cable. Tapered seal ensures that the slit closes completely on fitting - creates a watertight seal around the cable. Ideal for VHF, Satnav, GPS & Radar.