Hydraulic Gas Strut Lift Support Kitchen Door Cabinet Hingespring Brass Cover Size: extened length 9.5" compressed length 6" (ball socket to ball socket distance) Size for different pressure type varies slightly. Silence and soft with cabinet doors close With all screws for fixing Pressure: 80N/8KG, 100N/10KG, 120N/12KG, 150N/15KG