SPT4 Draper ToolsSpark Plug Tools Draper 10 Blade Feeler Gauge Imperial 100mm long taper blades. Each blade is marked with its size and folds into a plated steel case with thumbscrew. Blade sizes: Imperial: 0.0015, 0.002, 0.003, 0.004, 0.006, 0.008, 0.010, 0.012, 0.015, 0.025"
