THREE POINT LINKAGES SIETZ is $40 Million company dedicated to producing a quality product, that meets with the rigid requirements of its customers around the world, and carries a professional culture that ensures the manufacturing of a world class products. BOX ASSY. HYD LIFT (ALL MODELS) LOWER LINK HYD. LIFT-FT-60 (ALL MODELS) UPPER LINK HYD. LIFT (ALL MODELS)