Flute Pad Shims, Permanent, Adhesive-Backed, Choose Sizes, Made in USA! 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 flute pads. Shipping is free for additional sheets.