Widely used in medical, laboratory, furniture, automobile, industrial equipment. Opening and closing, tilting and shock absorption of the industry. No need to calculate torque. Adjustable torque after installation, saving time and effort. Simple adjustments using standard tools provided. Ideal for prototyping and short production runs. Suitable for application scenarios where weight changes. Ball and eye joints included in the package. Supplied in pairs. 1 pack contains: 2 x Air Rods, 4 x ball joints, 4 x rings, 1 x Allen key, 1 x Instruction Manual