Lang Tools 3072-23-Bld Feeler Gauge for Cummins Diesel Valve Adj. Loose set of feeler gauge blades have a range of .008" to .030" to cover heavy-duty truck engine applications 6" blade, with 1" long 90 offset Used in the Feeler Gauge Set for Heavy-Duty Truck Valve Lash Adjustment (part no. 3079)