19 blade feeler gauge with rounded ends. Each blade is etched with size for ease of use. Number of blades: 19 804 Blade thickness in 1/100mm: 4-5-6-7-8-9-10-15-20-25-30 Blade length: 90mm 804.L Blade thickness in 1/100mm: 4-5-6-7-8-9-10-15-20-25 Blade length: 150mm 804.SL Blade thickness in 1/100mm: 30-35-40-50-60-70-80-90-100 Blade length: 250mm