Pressfitting systems in copper and bronze, aesPRES / Bronzehttps://www.racmet.com/en-ww/aes-pres.aspx Products > Pressfittings > aesPRES / Bronze aesPRES / Bronze Pressfitting systems in copper and bronze aesPRES is the Pressfitting system by Raccorderie Metalliche in copper developed for any corrosion-proof application as well as when the high hygiene level of such a precious material is demanded. aesPRES material Cu-DHP 99.9 Copper/CuSn5Zn5Pb2 – CC499K bronze.