https://cyclelm.com/products/compression-ferrules-kit?srsltid=AfmBOoomQOj6ITTtFjCtknQYGUzFuVGnT-nN5rQbfHIfhPQHCm0X_CQF&variant=46454191849710 There are different barbs ABOT001222 ABOT001220 ABOT001221 for 5mm or for 5.5mm