This Vibrant 4 Ply Reinforced Silicone Straight Hose Coupling is a 4in I.D. x 3in long hose coupling designed to provide a secure connection between two hoses. It is made of 4-ply reinforced silicone for superior strength and durability, and is black in color. It features a smooth inner wall for unrestricted flow and is designed to withstand extreme temperatures and pressures. It is ideal for use in a variety of applications, including automotive, industrial, and marine.