Olson Saw CB50000BL 14-Inch Delta Band Saw Accessory Cool Blocks For Delta 14" Band Saws Contains: 3 guide blocks 1/2" x 1/2" x 3/4" and 1 guide block 1/2" x 3/8" x 1" Cool Blocks blade guides are made from a high tech, non-metallic composite material, "Graphite Impregnated Phenolic Laminate"