Material:the feeler gauge is made of hardened steel with lubricating oil coating, which can prevent pitting and corrosion, and is durable Double marked measurements: 0.0015 inch to 0.035 inch (0.04 mm to 0.88 mm) Portable: The copper sheet of the product is soft and bendable, with 32 different thicknesses, bendable and convenient to carry Function: Feeler gauge used to measure the gap between objects, such as tappet clearance thickness, bearing gaps, spark plug gaps, etc. Wide application: feeler gauge used for everything from guitars to engines and other hard-to-reach places, its a good helper for designers, engineers and mechanics 32 Blade Steel Mechanical Shim Set Ignition Spark Plug Gap Tool Double Marked Metric and Imperial Gap Measuring Tool Specification Product Name:Feeler Gauge Set Material:steel Color:silver Metric Dimensions (mm): 0.04, 0.05, 0.06, 0.08, 0.10, 0.13, 0.15, 0.18, 0.20, 0.23, 0.25, 0, 25, 0.28, 0.30, 0.33, 0.35, 0.38, 0.40, 0.43, 0.45, 0.48, 0.50, 0.53, 0.55, 0.58, 0.60, 0.63, 0.65, 0.70, 0.75, 0.80, 0.88 Sizes in inches: 0.0015, 0.002, 0.0025, 0.003, 0.004, 0.005, 0.006, 0.007, 0.008, 0.009, 0.010, 0.010, 0.011, 0.012, 0.013, 0.014, 0.015, 0.016, 0.017, 0.018, 0.019, 0.020, 0.021, 0.022 0.030, 0.032, 0.035 Quantity:32 blades Package:ziplock bag Character Hardened steel blades. Small size and light weight, easy to carry Metric from 0.04mm to 0.88mm, inch from 0.0015 to 0.035 Foldable design, each steel feeler gauge has a blade thickness of 32 , which is limited in the protector of blade to prevent damage to single blade Package includes 1* set of feeler gauge