VALVE GUIDE REAMER HIGH SPEED STEEL   HELIX 6 FLUTES H 7 TOLERANCE SIZE :- 3/8"  X 150 MM (6") QTY : 1 PC OPTIMAL FOR HEAD VALVE GUIDE AND INDUSTRIAL USE. For Bronze and Cast Iron Guides  WE ALSO MAKE SOLID CARBIDE VALVE GUIDE REAMER AS PER REQUIREMENTS IN INCH SIZE TOO. THANKS FOR BUYING ! For Bulk Purchase do email us at " Ask the Seller question" FREE TARIFF AND FREE DUTY FOR USA CUSTUMERS / BUYERS