Genuine Oetiker 2-Ear ClampsThe ears of these clamps do not have a dimple and nearly double the clamping range, compared to the 1-ear clamp. 2 ears provide a degree of elasticity to accommodate changes in size of the parts being joined, such as that which may be caused by thermal expansion or vibration.Clamp diameter The following applies as a guideline: To determine the correct clamp diameter, push the hose onto the attaching material, (e.g. the nipple), and then measure the outer diameter of the hose. The value of the outer diameter must be slightly above the average value of the diameter range of the clamp to be selected. The listed size of the clamp denotes the inner diameter (id) of the clamp. How to InstallThese clamps can be easily installed using Oetiker Hand Installation Pincers (HIP). The HIP tools have been designed especially for pinching ear clamps quickly and easily.Oetiker HIP Compound Action, Standard Jaw Pincer, Item No. 14100386Oetiker HIP Compound Action Side Jaw Pincer, Item No. 14100387Oetiker HIP Single Action Standard Jaw Pincer, Item No. 14100396How to RemoveEar clamps can be easily removed using Oetiker’s hand clamp cutter (HCC). The HCC tool is designed to safely remove ear clamps.Oetiker Hand Clamp Cutter, Item No. 14100407Please Note: The clamps included in this kit are not designed or intended for use in PEX applications. The sizing references for PEX clamps are not the same as standard Oetiker clamps. Oetiker PEX Clamps should be used for PEX applications.