Large Round Bur Block - Neon Yellow, Magnetic, 28 Burs Capacity, Diameter 2 13/16", Single Block. Steam and chemical autoclavable to 250°F. Easily stores different types of burs. Can accommodate various shanks. Compact design saves space. Autoclave sterilize. The Large Round Magnetic Bur Blocks provide a way to conveniently store and organize different types of burs. Each block can hold up to 28 burs, including latch-type and friction grip burs.They feature a compact design that saves storage space. Autoclavable up to 250°F.Different #s and colors are also available.