NUOLUX 17 Blades Feeler Gauges Stainless Steel Measuring Tool (Silver) This is High-precise 0.02mm to 1.00mm 17 Blades Thickness Gap Stainless Steel Metric Filler Blade Master Feeler Gauge Measuring Tool. Color: mainly silver. Material: durable stainless steel. Each blade length: about 100mm. 17 blade thickness: 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.10mm, 0.15mm, 0.20mm, 0.25mm, 0.30mm, 0.40mm, 0.50mm, 0.75mm, 1.00mm. It contains 17 blades, from 0.02mm to 1.00mm. Every blade with its thickness clearly on it, easy to select. also easy to return when you don't use. Ideal for feeler gauge valve shim use and metric gap measuring between two items or parts.