aFe POWER Universal Products Coupler Kit (4 x 3-1/2)in ID x 3in L - Black

This coupling features a diameter of 4 IN on one end and 3.5 IN on the other, with a total length of 3 IN. Constructed entirely from silicone, ensuring durability and resilience over time. It is reinforced with three layers of polyester for added strength and resistance against deformation. The coupling has a wall thickness of 4mm, providing robustness and reliability. Comes with two stainless steel clamps that are resistant to corrosion, ensuring a secure and tight fit in various applications.