Olson Saw CB50085BL 9-Inch Ryobi Protech Band Saw Accessory Cool Blocks For 9" 2 Wheel Band Saws such as Ryobi, Black & Decker, Sears Craftsman, Rotech, Trade master and Collins, etc Contains: 2 guide blocks 13/64" square x 13/16" and 2 guide blocks 13/64" square x 1" Cool Blocks blade guides are made from a high tech, non-metallic composite material, "Graphite Impregnated Phenolic Laminate"