Stanley J000D Proto 10 Blade Ignition Feeler Gauge Set 1/4-inch x 1-3/4-inch blades in steel holder. Sizes: .013-inch, .015-inch, .017-inch, .018-inch, .020-inch, .025-inch, .030-inch, .032-inch, .035-inch .040-inch. Blades etched with both decimal size and metric equivalent. 0.06-lbs Weight.