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Concentric Pattern (rtbp003/4)
Product Details :
Crosshair With Concentric Circles Inch : 0-0.50" in0.05" incrementsAvailable in 27 & 21mm dia.Metric : 0-10mm in 1mm increments.Available in 27 & 21mm dia.Metric Concentric Scales Concentric squares from the center 2, 4, 6, 8, 10mm.Available in 27mm dia.