... 2.size:15cm straight ruler set 3.OEM /ODM . plastic student ruler set(4pcs)1.material,plastic .2.size:20cm straight ruler set ,25g . we also ... have 20cm , 25cm ,30cm,35cm,40cm ,45cm straight ruler set . or we can make according your request . 3. OEM /ODM ... opp bag . 900sets/carton ,62*31*31.5cm5. Available in different designs,shapes, 6. Advanced and high quality lenticular ruler7.We ...