Grinding wheel and cutting wheel for hypodermic needles. Grinding wheel and cutting wheel for hypodermic needles and precision stainless steel andalloy products. Shape: FLAT, SINGLE FLANGE, DOUBLE FLANGE Sizes: OUT Dia 128-600MM,Thinckness: 20-200MM Material: WA, GC Grit: #,600,#800, #1000, #1200 Instructions:#600 for coarse grinding or extra large needles.#800 for semi-precision grinding