... -4 color printing,lamination/varnishing 3)Also Magnet Sticker Features:Round BMI Slide Rule (Magnet Sticker) 1)Surface Material Option :157g/200g ... color printing, lamination/varnishing 2) Magnetic: 0.40-1mm thickness magnet 3) Round BMI Slide Rule design,used as a ruler ... your fit,also the rulercan be used as a fridge magnet and sticker on iron objects.Easy to use anyway. 4 ...