Constructed of injection-molded polypropylene, this Sea-Dog collector box is designed to be used in conjunction with a louvered vent to facilitate air intake and exhaust. Collector box can be used with either stainless steel louvered vents or injection-molded ABS louvered vents. Box is also interchangeable with Attwood models 1341 and 1342. Compatible with 3" hose sizes. 15-1/2"L x 2"W x 4"D.