Center buckle strap for diono convertible car seats. Please select the correct version based on the manufacture date of your product. Standard 5″ (pre May 2018) – Suitable for Diono Olympia, Pacifica, Rainier, Radian convertible seat manufactured prior to May 2018 Long 6.5″ (pre May 2018) – Suitable for Diono Olympia, Pacifica, Rainier, Radian convertible seat manufactured prior to May 2018 Standard 5″ (June 2018- December 2019) – Suitable for Radian 3 and Rainier 2 convertible seats manufactured prior between June 2018 and December 2019 Long 6.5″ (June 2018- December 2019) – Suitable for Radian 3 and Rainier 2 convertible seats manufactured prior between June 2018 and December 2019 Standard 5″ (January 2020 - present) – Suitable for Radian 3 convertible seats manufactured prior from January 2020 to present Long 6.5″ (January 2020 - present) – Suitable for Radian 3 convertible seats manufactured prior from January 2020 to present
