If you have old Ortlieb panniers with QL1 hooks, these are the inserts you need.
{{ 'Leave your e-mail address so we can send you an e-mail when this product is back in stock.' | t }}
Pack of 4 inserts, 2 x 8mm and 2 x 11mm.
Each pack contains enough hooks for one pannier, so if you have two panniers, buy two of these.