Material Spec W1 Band: St 34 metallic (DIN 2393 C) Finish: Silver-white Cr3 Zinc-Plated How to select the correct size? - Measure the OD of your application (OD = Outside diameter) - Select the Double Ear Hose Clip that fits your OD accordingly Note: Please watch out that once you insert the connector into the hose the hose OD does not increase. How to use the Double Ear or Single Ear Clip? - Safely role the hose / hose clip - You can both use a Front Ear Pincer or a Side Ear Pincer - Front ear pincer = If you have lots of room and are able to be face on - Side ear pincer = Is handy if room is restricted, you should utilize the side of the pincer - Once ready firmly squeeze the pincer tightly....... Done! How to pick the proper size Double or Single Ear Clip? - Accurately measure the OUTSIDE diameter of your hose / utility (see photograph below) - Select the Ear Clip which size vary suits the OD of your hose - Watch out for the hose OD increasing once you push in your software - Example: If your hose is 5mm OD, select the 5-7mm