Norco Flat Base with a 12.5-ton capacity has a 6-1/2" diameter for use on rams with a 25-ton capacity. This heavy-duty base provides firmer and more stable footing for rams, featuring a circular design with a 2 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. Norco charges a limited access fee for shipments to military bases, schools, churchs, and all other gated areas, as well as charging a substantial fee for re-delivery of order, lift gate use, and residential delivery. Also, local sales taxes will be applied to ALL Norco orders shipped to California.