... *33*42cm, 25pcs/CTN. 1pc/pp, 5 corrugated casecolor : blue. ( you can choose , blue, green , white, red, yellow) But the best is blue ... school by bike, it is dangerous. if you open the light, some one can see it. so the backpack as foglight. this ... kind technique can use on some sport bag. when you go out , there are several people,you will not be lose ...