Housings, manifolds and valve bodies are multi-sided prismatic parts with bores and threaded ports on several faces — ideal for a 4th-axis VMC or, in volume, an HMC with a pallet changer that works all sides in fewer setups. Concentric bores and true positions reward rigidity and probing.
Volume pushes you horizontal; mixed work stays on a 4-axis VMC. Value both at The Machine Blue Book.
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