Internal Medium Duty Spiral Ring System of Measurement Inch Location Style Internal Thickness 0.037 in Fits Groove Diameter 1.167 in Fits Groove Width 0.042 in Fits Groove Depth 0.021 in Free Outside Diameter 1.18 in Material Stainless Steel Material Grade/Class 18-8 Ring Type Internal Med Duty Spiral Ring Clearance Diameter Type Free OD Thickness Tolerance +/-0.002 in Standards REACH Compliant RoHS Compliant Groove Width Tolerance +/-0.003/0.000 In.