10-Hole Combo Anodized Aluminum Bur Block. Holds 10 Burs (5 FG and 5 LA). 1 5/8' x 1 1/8', Single bur block. Can be autoclaved, dry-heat sterilized, chemiclaved or placed in an ultrasonic cleaner. With the attached cover, the burs are held securely in place. Single bur block