310 coil tube is a type stainless steel coil tube can be used of oil feild ,pipe fitting ,and some  instrument ect 

the grade is ASTM 310  the surface is bright and soft and annealed ,the length can be 4000M/coil without any welded ,Liao cheng sihe stainless steel material ltd ,can produce 310 coil tube ,the length can be up to 4000m/coil  Grade is  ASTM JIS DIN 304 304l 316316l  2205  625  825 coil tube