Product Descriptions 【Measure Gap Widths】Offset valve tappet gauge tool is a wide range of professional automotive-specific tools designed to measure the gap between the valve tappet and the valve stem of internal combustion engines. 【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) .