International Door Closers Model 230 Body Only - With Standard Medium spring tension - 105 Degree Backstop with Hold-Open function for Center Hung Doors 105 Degree Backstop Hold Open Body only Suitable for Exterior Doors from ( 31 Closing and Latching speeds controlled by separate regulating valves fully adjustable after instal With Standard Medium spring tension. For use on center pivoted installations - UL Listed Stable hydraulic door check fluid for any climatic operation and constant lubrication