... comforms EN71&ASTM standards 4 pcs colorful rulers plastic ruler set,school ruler set,color ruler Material:plasticScale:30cm(12inches)Specification: ... 2005, is located in ShenZhen,our company mainly produce stationery set, gift and promotion item, high-gradepencils and color pencils ... , pencil case such as a series of OEM stationery set. and with professional designers and staff .. Our subsidiary ...