Kennedy: Telescopic Gauge Set (6 Piece) With knurled satin finish bodies providing positive adjustment of the hardened and radius ground plungers ensuring accurate measurement of the internal diameter when used with a micrometer. For smaller diameter measurements use the small hole gauge. Features and Benefits Knurled satin finish bodies Accurate measurement of the internal diameter when used with a micrometer Supplied in a size marked PVC storage wallet, with stud fastening Contents Contains 1 of each size A - F inclusive Set range: 8 - 150mm (5/16 - 6) MPN: KEN5181180K EAN: 5036140014220 Telescopic Gauge Set (6 Piece) Attributes: Includes: 13-19mm (1/2 - 3/4") gauge 19-31mm (3/4 - 1.1/4") gauge 31-54mm (1.1/4 - 2.1/8") gauge 54-89mm (2.1/8 - 3.1/2") gauge 8-13mm (5/16 - 1/2") gauge 89-150mm (3.1/2 - 6") gauge PVC storage wallet Measurement Range: 8 to 150mm Number of Pieces: 6 Set Type: Telescopic Gauges System of Measurement: Imperial Metric