Beckson "rain drain" opening ports are made in the U.S.A. from the finest marine grade plastics available today. All metal parts are stainless steel. The lens is made from tough Lexan material.
RWB2760: Port-Opening OA 314x140mm (cut-out size 89 x 264mm)
RWB2762: Port-Opening OA 324x172mm (cut-out size 114 x 254mm)
RWB2764: Port-Opening OA 372x197mm (cut-out size 140 x 318mm)
RWB2766: Port-Opening OA 425x172mm (cut-out size 114 x 365mm)
RWB2767: Port-Opening OA 425x248mm (cut-out size 190 x 365mm)