Shim washers are often used in gliders to remove fore and aft play at the wing tips. They can be placed on the front and/or rear lift pins at the wing roots on some gliders that do not offer an alternative means for adjustment.
Please check what size you need for your glider.
This product is for a set of 5 of:
22mm outer diameter x 16mm inner diameter x 0.3mm thickness shim washers (DIN 988) - Stainless Steel (A2)