The heavy duty 750N12V DC motor linear actuator is with pre-installed limit switches, sealed and lubricated shaft, metal gears etc. Suitable for applications as electric automatic window, electric sofa, electric lifting stage, manual ICU bed, industrial machine/platform development etc. Specifications: Main color: silver Stroke length: 50mm, 100mm, 150mm, 200mm, 250mm, 300mm (optional) Waterproof: IP54 Noise Value: >65dB Package size: 50mm: 200 * 80 * 50mm / 7.9 * 3.1 * 2.0in 100mm: 250 * 80 * 50mm / 9.8 * 3.1 * 2.0in 150mm: 300 * 80 * 50mm / 11.8 * 3.1 * 2.0in 200mm: 350 * 80 * 50mm / 13.8 * 3.1 * 2.0in 250mm: 400 * 80 * 50mm / 15.7 * 3.1 * 2.0in 300mm: 450 * 80 * 50mm / 17.7 * 3.1 * 2.0in Package weight: 50mm: 984g / 2.2lb 100mm: 870g / 1.9lb 150mm: 970g / 2.1lb 200mm: 1070g / 2.4lb 250mm: 1290g / 2.8lb 300mm: 1373g / 3.0lb Package list: 1 * Motor Linear Actuator 2 * Mounting clamp with screws