Mitutoyo Metric 20 Leaf Set Feeler Thickness Gage Features include... Each leaf of the thickness gage is made of fine tempered steel, hardened Tapered thickness gage: Metric 20 leaf set 0.05mm, 0.10mm, 0.15mm, 0.20mm, 0.25mm, 0.30mm, 0.35mm, 0.40mm, 0.45mm, 0.50mm, 0.55mm, 0.60mm, 0.65mm, 0.70mm, 0.75mm, 0.80mm, 0.85mm, 0.90mm, 0.95mm and 1mm 150mm in length 13mm Wide Blade The exact thickness is marked on each leaf.