Blue Steel strip 1)steel grade : 50# 65Mn 2)Color: black, bright,blue, ... shovel, woodworking band saw, automatic clutch patch , reeling shutter spring steel strip, horologe clockwork spring ,shoes material ,hook material, spin ,standard ... stamping ,packing strip, and other industrial-used steel strip.5)Package: oiled, plastic film inside, sackcloth outside ...