Siegen tools by Sealey. Sealey Feeler Gauge 32 Blade - Dual Marked. Imperial graduated 32 blade feeler gauge. Blade Size(s): Imperial 0.0015", 0.002", 0.0025", 0.003", 0.004", 0.005", 0.006", 0.007", 0.008", 0.009", 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", 0.023", 0.024", 0.025", 0.026", 0.028", 0.030", 0.032", 0.035" + 0.010" Brass.