1) full open aluminium easy open end 2) model:502 3) diameter:126.5+/- 0.1mm ... for packing dry food.such as milk powder full open aluminium easy open endsize:502diameter:in-diameter:126.5+/- 0.1mm out ... milk powder, coffee powderfood packaging,easy open lid,cans lid,food packaging,lid, easy open end,tennis lid,Can lid,Easy opener ...