1The shell is made of high quality ABS material, acid resistance, alkali resistance, strong corrosion resistance 2The led bulb is high strength,long lifespan and low energy consumption, and protection of the eyes, more natural and comfortable 3Use N38 material powerful magnet, and through three electroplating process, the anti-slip ring adopts of PVC new material, anti-skid and corrosion resistance, suitable for all kinds of sewing machines 4The led bulbs adopt of imported lamp core, 8-10 lm, high lm led bulbs, soft light 5Dovetail protection, dovetail design to prevent breakage, aging resistance