Adhesive-backed flute pad shims allow for quick, easy adjustments during re-padding. Simply peel and stick to the back of a flute pad, as needed. These shims are supplied by the sheet and the sheets may be cut to simplify shipping. For open or closed hole flutes. Diameter: 17.5mm, Thickness: .004" Quantity Per Sheet: 60 (2 sheets) Adhesive Type: Permanent