Blasted coupon, grit, 1.5-5.5 mils

Range: 1.5-5.5 mils

Assess surface profile depth (generated by abrasive blast cleaning) quickly and easily with these durable 3" reference discs. The blast cleaned surface is visually compared to five segments on the reference disc through a hand held illuminated magnifier. Each disc is a high purity nickel electro-formed copy of a master disc duplicated to within +/- 50 microinches. The standard kit includes one reference disc in a vinyl pouch and an illuminated magnifier equipped with a magnet to hold the reference disc in place during inspections.

Conforms to ASTM D4417, Method A.