US PRO Tools 4pc Fluid Line Hose Clamp Set, Pinch off, 5814 To pinch off fuel, vacuum, transmission, brake, heater lines / hoses and more Sizes: 3/8", 1/2", 1" & 1 3/4" Applicable hoses sizes: 10, 15, 25 & 45mm dia These do not spring open and catch you off guard!! U-bolt design with thumb screw operation Clamp 1_max 3/8" (10 mm) Clamp 2_max 1/2" (15 mm) Clamp 3_max 1" (25 mm) Clamp 4_max 1-3/4" (45 mm) Please check to ensure the pipe/hose is suitable for this type of clamping method Note some may have brand opposite way round on clamps as shown.. FREE DELIVERY TO UK MAINLAND