Made of premium plastic material, durable and impact-resistant. Simple design ,Integral solute, sealed leakproof ,Thickening material, strengthen the hardness A great aftermarket replacement for your old or broken one. Suitable for connecting any 75 to 75 ducting. For extending 75 internal diameter ducting. Specification: Product Name: Duct Joiner Connector Length: 50mm Diameter: 75mm Function: Connect 2 tubes together Colour: Black Material: Plastic Package Contents: 4 x Duct Joiner Connector Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.