Check the listing for details. LANG Tools 28A Gas Engine Ignition and Tune-Up Feeler Gauge for Spark Plug Gap. Condition: New. Listed at 11.85 USD. Here is a Lang 28A Gas engine tune-up feeler gauge set.Contains:Nine - 3" x 1/2" blades with thickness .002, .003, .004, .006, .008, .012, .013, .020, .025 inch. Five - 1" x 1/4" blades with thickness .025, .030, .035, .040, .044. Steel ruler. Spark plug electrode adjusting tool. To see our German Tools on eBay just click here. ★ Samstag Sales combines shipping for multiple items to save you shipping costs! We will combine the items into one package for a lower shipping cost and refund the difference. Any questions, please contact us! ★ NOTE: Foreign Buyers must pay any customs tax or import fees due in their home country. Please ask your local official about any fees that could be due.★ Samstag Sales is the preferred source on eBay for fine German Made hand tools. In the fall of 1997 we began selling fine German Made hand tools on eBay.