Click to expand Tap to zoom Lisle, Feeler Gauge. Valve Tappets for Univ. by Lisle Save £-11.37 £11.37 | / SKU MCS530849 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart DescriptionLisle, feeler gauge.Valve TappetsDetailsUS sizes. Tool dimension 1/2" wide x 4" long. 11 offset steel blades .008" to .026" (.203mm to .660mm).Univ.