Discover the convenience of ASCO Subbases for Series 519, 520, and 521 Valves. Made from lightweight alloy, these subbases come with screws and seals for easy valve adaptation and feature ports 1-3-5 that can be connected at both ends. With the ability to simultaneously operate up to 5 spool valves without pressure loss, these subbases are perfect for efficient fluid control. To operate more valves, simply supply pressure through the appropriate inlets on each side of the subbase. Order your ASCO subbases today!