Price: (as of – Details) Merach Twister Arm Exerciser, 22-440lb Hydraulic Power, Adjustable Home Chest Expander, Shoulder Muscle Training Fitness Equipment, Arm Enhanced Exercise Strengthener Upgraded Arm Trainer: Increase protective housing at the hydraulic cylinder and strength gauge, which can cushion the accidental impact, protect the hydraulic cylinder and strength gauge from mechanical damage, avoid…