Click to expand Tap to zoom Kpmi Valve Guide Hone, 5/16 Inch (.3125") for Univ. by Kibblew Save £-0.13 £28.83 | / SKU MCS524534 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart DescriptionKPMI VALVE GUIDE HONE, 5/16 INCH (.3125")DetailsFor cast iron, manganese bronze, C630 bronze & Ampco-45 bronze; Used to finish hone to correct toleranceUNIV.