Norco Base Attachment with a 5-ton capacity is for use on rams with a 10-ton capacity. This base attachment is internally threaded and bolted to the bottom of a ram to receive other attachments, featuring a cylindrical design with a 1-1/4 x 11-1/2 female connection. Note: When cylinders are used with maintenance set attachments or components, the maximum system pressure must be limited to half the rated pressure. Also, local sales taxes will be applied to ALL Norco orders shipped to California.