"EI" and "PI" series valves are made in compliance with ISO 5599 standard that provides the dimension of the place where to fix the valve. The range is composed of size 1 and 2 with 5/2 and 5/3 type. Customer has different choise to do because are available differents electric pilot for each valve. "AL" is the 90° pilot version and the "LN" the axial pilot position. They both use the "SL..." solenoid. The version "….CN" with "SL-CN..." coil is conform to the CNOMO standards for both base and coil. Anyway is possible to use the "SL..." coil. Obviously, beside single base, manifold are available and exists a connection plate that allows to connect size 1 with size 2.