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LingGan Aperture ruler Taper Gauge 1/8-5/8-3/16-3/4 Inch 1-15-30-45mm Stainless Gap Hole Taper Welding Gauge Test Ulnar Inch & Metric (5/8-3/16(15-30mm))Amazon$28.99
MMLFX 1pc Test Sieve Lab Soil Standard Test Sieve Stainless Steel 200mm Diam Round Holes Aperture 1/2/3/4/5/6/7/8/9/10/15/20/30mm (Size : 15mm)Amazon$234.97
LCyindu 35T Hydraulic Hole Punching Tool Hole Digger Force Puncher,3/8",1/2",5/8",3/4" Puncher Apertures,Smooth Hole Puncher for Aluminum Stainless Steel Iron Plate Copper Bar,CH-70Amazon$226.00
7ARTISANS 50mm F1.4 Tilt Shift APS-C Lens,7 element in 6 group,46°Angle of view,De-clicked Aperture ring,For M4/3 Mount Camera Panasonic GX9 G100 GH5 GH5II GH5S GH6,Olympus E-PL9 OM-1II OM-5 E-PM2.ectAmazon