Check the listing for details. Replacement Screw Tattoo Cartridge Needles Microblading Needles for Derma Tools. Color: Clear, Condition: New. Listed at 12.99 USD. Disposable Screw Tattoo Needle Cartridge For Premium Charmant Permanent Tattoo Machine 1R 1D 3R 5R 5F 7F FEATURE:1) 100% brand new and high quality 2) Help beginners quickly raise the level of tattoo skill 3) Synthetic material, safe, without harmful substances 4) Flexible, an authentic feel 5) Ideal for beginners and experienced artists. 6) Makes the tattoo artist working easier. 7) The Default Package includes: 20/50pcs blades. If you need different mixed package, please leave us the note. 8) With screw port If you need bayonet port, please contact us. 9) Fit for Premium Charmant machine with 8mm diameter screw If you need other needles for 10mm screw Premium Charmant and 9mm screw Charmant II, please contact us. Specification:1) Theme: Tattoo Art 2) Material: Stainless steel 3) Screw diameter: 8mm 4) Quantity: 20/50pcs Please check your machine screw diameter carefully. If it is not the same, please leave us the note of the actual measurement. Thanks a lot.