Size 1/2" (13.3 mm), Oetiker Stepless Ear Clamps, Single Ear Hose Clamps, 7 Pack Sizes Available (100) Genuine Oetiker Clamps 360 Stepless Design - no steps or gaps on inner circumference Narrow band, concentrated seal compression Specially formed strip edges reduce the risk of damage to the part being clamped Please note - the size of the clamp denotes the Inner Dimension (ID) of the clamp.