PLASTIC RISERS REINFORCED WITH METAL HOOK MADE OF REINFORCED PLASTIC WITH FIBERGLASS AND MINERALS, THE PREMIUM RISERS SLIDE PERFECTLY BETWEEN THE HAIR WITHOUT DEFORMING AND ARE PARTICULARLY DURABLE. MAIN FEATURES BAG WITH 10 RISERS: 1.5 - 3 - 4.5 - 6 - 10 - 13 - 16 - 19 - 22 - 25 MM THANKS TO THE METAL HOOK, THEY MOUNT SECURELY ON THE HEAD AND DO NOT RISK COMING OFF DURING USE COMPATIBLE WITH ALL HAIR CLIPPERS WAHL, EXCEPT BALDING AND BERETTO