Bluemoona 5 PCS - Green Chromium Oxide Compound Bar Micron Compounds 31mm 1 5/16" x 28mm 11" x 19mm 3/4" Material: Compounds Color : Green Quantity:5 PCS Length X Width X Higth : 31mm 1 5/16" x 28mm 11" x 19mm 3/4" Apply by rubbing on fabric, linen, or leather strops for a keen edge on straight razors.