Feature: 1. FOR CUTTING MACHINE: Replace the original for pen holder, compatible with for Explore Air, Air 2, Air 3, Maker, Maker 3 cutters 2. 17 COLORS IN TOTAL: A total of 17 colors, compatible with for Sharpie, for Sakura, for Pilot, for Pentel, for Mitsubishi uni Ball 3. PERFECT ALIGN: Adapter can perfectly align each pen, marking exact height and point center, reliable and you can use with confidence 4. EASY TO IDENTIFY: You can easily identify each adapter by number, fast and convenient, therefore saving a lot of time 5. SCRATCH RESISTANT ABS: Adopt good quality ABS material, possess impact resistance, scratch resistance, environmentally friendly Specification: Item Type: Pen Adapter Set Material: ABS Pen adapter number Corresponding pen model 1 For Sharpie Fine Point 2 For Sharpie Ultra Fine Point 3 For Sharpie Art Pen 4 Fine Point Permanent marker 5 Ultra Fine Point Permanent marker 6 Finel iner Marker (Fine and Medium) 7 For Sharpie Oil Based Paint 8 For Sakura Gelly Roll 9 For Pilot Accurate V5 and V7 10 For Pilot G-2 11 For Pentel RSVP Ballpoint pen 12 Fine Line Marker 13 For Amaza Gel Pens 14 Detailing Gel Pen 15 For MITSUBISHI Uni ball signo um-153 16 For Flair Felt Pen 17 For Sakura Pigma for Micron Pen . Package List: 17 x Pen Adapter