https://gasuperabrasive.com/products/round-cbn-insert-0-375-3-8-inch-dia-0-125-1-8-inch-thick-5-degree-rng-32tne7/
Round CBN Insert 0.375 (3/8)inch Dia. 0.125 (1/8)inch Thick 5 Degree RNG-32NE7
Cubic Boron Nitride Tooling Insert - Round CBN Insert 0.375 (3/8)inch Dia. 0.125 (1/8)inch Thick 5 Degree RNG-32NE7