1.material:hign quality EVA, sandpaper,PS board 2.common size:70*60*10mm ... 3.color:customized 4.accept OEM orders Specifications:Materail: EVA,(sandpaper),pp board,emery Size: 70*60*10mm Color: ... professional or not is based on this part.Good quality file is easy to shape the nail and the ... the stress in process .the EVA we use for our products is high resilience non-toxic EVA Layer 4 : PS Board,the ...