Blue Silicone Straight Coupling Connector Hose Size: 2.5 Inch / 63mm Silicone straight coupling connector hose. Premium product made by SFS. Standard 76mm length. Polyester reinforced 3 ply with a 4.5mm wall. For automotive, domestic, industrial & commercial industries. Murray clamps not included. A full range of Murray clamps available in our shop. Silicone hoses are used throughout the world in every type of professional motorsports vehicles due to their high resistance to extreme temperatures as well as chemicals such as oil and coolant. These silicone hoses are ideally suited for use with high and low-pressure turbo, intercooler and induction systems.