Offset Valve Tappet Gauge Feeler Gauge Set A308 11 Blade Offset 0.004" to 0.014". The Offset Valve Tappet Gauge Set features 2-Handles and 11-Blades. 【11 Sizes From. 004" to. 014"】 (.004"/.102mm), (.005"/.127mm), (.006"/.152mm), (.007"/.178mm), (.008"/.203mm), (.009"/.229mm), (.010"/.254mm), (.011"/.279mm), (.012"/.305mm), (.013"/.330mm), (.014"/.356mm).