B03F 4 Inches Subwoofer Woofer Speakers Ports Connectors Tube Inverter Speaker VentOOTDTY  Description:Features:brand new and high quality.Light weight and easy to install and use.Can replace your old and broken sound box guide tube.Improve the sound quality of the sound box.Suitbale for 4 inches sound boxes.Specifications:Item Type: Sound Box Guide TubeMaterial: PlasticColor: BlackSize: Diameter: 3.5cm/1.38in Length: 6.7m/2.64in (approx)Quantity: 1 Set (1 Pair) (other accessories demo in the picture is not included)Note: 1.Transition: 1cm=10mm=0.39inch2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Package includes: (No retail package)1 Pair X Sound Box Guide Tube