PRECISION REAMER FOR MANGANESE BRONZE VALVE GUIDES NICKEL
Brand: KIBBLEWHITE
These reamers have been specifically designed for KPMI® Manganese Bronze and Cast Iron valve guidesAlso, once a reamer is used on Cast Iron, it is not advisable to then use it on a bronze guideDo not attempt to use these reamers to size C630 Nickel Aluminum Bronze guidesAll cutting diameters are +/- .0002''
https://shopping.truda.io/product/precision-reamer-for-manganese-bronze-valve-guides-nickel
These reamers have been specifically designed for KPMI® Manganese Bronze and Cast Iron valve guidesAlso, once a reamer is used on Cast Iron, it is not