SPI 17-865-7 Bore Gage Accessories; Type: Spare Part Kit; Maximum Measurement (Inch): 0.0001; Number Of Pieces: 5; For Use With: Electronic Bore Gages; Dial Bore Gages; Includes: #4 Anvils (1.4 - 2"); #6 Extension; #3 Anvils (2-6"); #10 Clamp & Clamp