"EZ's NANO is a rotary machine that incorporates the functions of a coil machine. Compatible with most of cartridges in the tattoo industry. Bulit for precise and crisp lines the NANO is highly capable of delicate dotwork, as well as all types of line work and tradional work. The ONLY 2.37 ounces lightweight and 20mm Ultra Thin design keeps the hand comfort and reduces the hand fatigue which allows the artist to work perfectly for the long session tattoo. NANO is an all-around master with 3 strokes (3.5mm, 2.5mm, 4.2mm) , distinguished by its color( Gray 4.2mm stroke length and Golden 3.5 mm stroke length) and the extra stroke of 2.5mm that is included in the box permits the tattoo artist to be switching as he/she wants, Limited lifetime warranty EZ will provides NANO body components not subjected to normal wear and tear will be covered under warranty for the life of the machine. The motor warranty will be covered for 1 year from the date of purchase."