professional nail files/printed nail filesDescriptation Layer 1: Emery,which is actual the functional part of the product.The standard to check if a manufacturer is professional or not is based on this part.Good quality file is easy to shape the nail and the emery on it could standfor a long time wrok.Layer 2: Paper,the artwork we see on the file is on this layer,we usually receive artwork from our customers,you can do your own design on this part,your signiture,photos,or business logos.Layer 3 : Eva, the part to buffer the stress in process .the EVA we use for our products is high resilience non-toxic EVALayer 4 : PS Board,the hard part to stand the shape.Layer 5 : Same with 3Layer 6 : Same with 2Layer 7 : Same with 1Contact informationCompany: Dongguan City Jindun Abrasive material Co.,Ltd.