The size designations of stainless steel loops are nominal. Theactual volumes can differ from the theoretical designations becauseof the 0.025 mm (0.001) tolerance of the metal tubingbore. Accuracy of large metal loops (1.0 mm, 0.040 bore) is about5%, intermediate loops (0.5 mm, 0.020 bore) 10%,and small loops (0.2 mm, 0.007 bore) 30%. Bore: 0.30mm.Model 7725 Injector loops are not interchangeable with loops forthe Model 7125. The port angle for the 7725 is 30° whereas theport angle for the 7125 is 20°, requiring the loops to have adifferent shape.