These UJK Technology jointing biscuits are high quality, selected beech wood. The manufacturing process involves compressing the wood by a carefully controlled amount. When the biscuit comes into contact with glue, it expands slightly in the biscuit slot forming a perfect fit. This results in a permanent, strong joint. Manufactured in Europe and available in two sizes: No.10 (53 x 19 x 4mm) or No.20 (56 x 23 x 4mm).