Speaker Port Tube Bass Reflex Vent Connection 3-5 Inch 35 x 80 mm Subwoofer Woofer Box Pack of 2

WOWOWO 2PCS Speaker Port Tube Bass Reflex Vent Connector 3-5 inch 35x80mm Subwoofer Woofer Box,Black

TERF® Black Nylon Spacer Washer M6 (6mm) X 24mm X 10mm Nylon Spacer Washers Size: 6mm Inside Diameter (Hole) X 24mm Out Side Large Diameter X 10mm Thickness - Pack of 8