Hydrogel film cutting knife head for Sunshine SS-890C cutting machine, Hydrogel film cutter head replacement part suitable for Sunshine SS-890C film cutting machine, it's used for cutting mobile phone front glass back cover film. Hydrogel Film Cutting Head Knife Blade For Sunshine SS-890C Cutting Machine Product Features : Imported high precision industrial grade cutting head Imported cutting head / precision cutting / APP smart operation Suitable for mobile phone front / rear film, watch, AirPods, camera, iPad, ect... Retractable, disassembled, replaced, fine aperture, durable, physically adjustable cutting head under pressure The perfect combination of cutting precision and model data makes the finished films and fit perfectly with the mobile phone Cutter head installation and replacement : Prepare a new knife needle and unscrew the knife needle clamp. After unscrewing, take out the cutter head. Press the knife needle and carefully remove the knife needle. Replace with a new knife needle. Adjust the knife needle to the middle of 2-3. Tighten the knife needle clamp (check if the holder is fixed, if not, tighten it). Package Includes : Option 1: 1pc Cutter Head Option 2: 2pcs Cutter Head Option 3: 3pcs Cutter Head