Black 2.5" (63mm ) Straight Hump Silicone Hosetube Pipe Coupler NameUniversal Straight hump Silicone Hose, Black Inside Diameter: 2.5 inches or 63 mm Length: 3 inches or 76 mm Thickness of wall: 5 mm, 4 ply reinforced Size tolerance: +/-0.5 mm