PHD released the newly redesigned Series CV Cylinders on April 2, 2007. As a result, the current design will phase out as a standard PHD product. The new design is an exact drop-in replacement. All user interfaces and unit geometry are maintained.  The end result is a cylinder with improved piston support and more robustly retained rod bearing, rod seal, and piston seals which provides longer life, industry leading reliability and superior delivery.