Gauge assembly: made of stainless steel, each measuring gauge has 32 blade thicknesses; The collapsible probe gauges, easy and convenient to move in Easy identification: metric and imperial double marking, 0.0008 inch / 0.02 mm to 0.040 inch / 1 mm, the number of sizes is engraved in a gauge. isolation for easy identification Metric Dimensions (mm): 0.02; 0.03; 0.04; 0.05; 0.06; 0.07; 0.08; 0.09; 0.10; 0.13; 0.15; 0.18; 0.20; 0.23; 0.25; 0.28; 0.30; 0.33; 0.38; 0.40; 0.45; 0.50; 0.55; 0.60; 0.63; 0.65; 0.7; 0.75; 0.8; 0.85; 0.9; 1.00 Inch dimensions: 0.0008; 0.0012; 0.0015; 0.002; 0.0025; 0.0028; 0.003; 0.0036; 0.004; 0.005; 0.006; 0.007; 0.008; 0.009; 0.006; 0.007; 0.008; 0.009; 0.010; 0.011; 0.012; 0.013; 0.015; 0.016; 0.018; 0.02; 0.022; 0.024; 0.025; 0.026; 0.028; 0.03; 0.032; 0.034; 0.036; 0.04 Attention: there is anti-rust oil on the stainless steel dipstick to prevent it from being rusty, please don't worry about it