Capri Round Bur Holder 27 Holes Heavy Transparent base with trasparent lid. Holds bot air motor and micro motor burs.27 Holes Round Auto Clavable Base For Air Rotor Burs, Heavy Base with LID. HOLDS 21 Bursm One Piece. For Air Rotor Burs, Heavy Base with LID. HOLDS 12 Bursm One Piece.