Black vent grill holds 4" blower hose on a 1.5" smooth barb that that allows double clamping, if desired. This black air vent cover is enough to keep trash and critters out but still allows maximum ventilation.
Made in the USA !
Dimensions: Flange is 4-7/8" diameter overall and installs in a 4" hole with 2 screws (not included).
