... ok 3,colour: nature colour 4,Cer:ISO9001 plastic planetray gear sets1,material:pom2,size:different size is ok3,colour: ... carbonadoing, Others optional;7):Products could be finished per customer's samples or drawing;8):Could be packed by cusotmer ... 's requirement;9):Quality control equipments:Roundness Meter,Projector Meter, Microscope, Gear-test Meter, Surface measuring Meter ...