... height, good quality and promotional gifts for students promotional straight ruler 1. Size: 159*30MM 2. body color: clear 3. Logo ... are available. 6. Certification: EN71 standard.7. The plastic straight ruler is good for draw line straightly and good for school ... : 10000PCS. Further more, for stationery, we are not only producing ruler, but we also can manufacture erasers, pencil box..Looking forward ...