T-H Marine CS-1-DP Clam Shell Vent – 9/16in x 1-7/8in Opening – 2in x 2in Base – Black – Pair

These super-strong molded clamshells are an economical and attractive alternative to metal clamshells. These clam shells are great for routing cables or wires through a hole or for covering thru-hull openings to shield water spray. They are also useful for covering small vent holes for ventilation. These vents are UV and weather resistant.