Item include: One Piece 192 needles derma roller Item: Microneedle Derma Roller Certification:Medical CE / ISO13485 Model Number: Z-192 Needle Numbers: 192 needles Needle Lenghts: 0.25 mm / 0.5 mm / 0.75 mm / 1.00 mm / 1.5 mm /2.5 mm (Available for purchase) Needle Type: Single needle Needle Material: Titanium Gold (Medical Grade Stainless Steel with Gold Plating) Color: Metal