Just replace the needle.Needle length is adjustable to different sizes depend on the areas and purposes of the treatment. It is more convenient to treat narrow area such as nose,around eye or mouth. It is an eletronic automated Mini needle,with guides that adjusts needles length. It is hygienic,convenient,and safe.The perpendicular movement of the needle tip enables treatment of narrow areas,and lessen the pain. color:blue Material:stainless steel+plastic Packing size:20*20*5cm :36Pin Package Contents: 10 * tattoo replacement needles Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.