This 7 L / 15 lbs sausage stuffer features an air release valve, producing sausages that are tightly packed with minimal air bubbles. During sausage stuffing, you can adjust the speed to fast or slow for efficient operation. It is ideal for commercial use in supermarkets, restaurants, and more. | Vevor | | Manual Sausage Stuffer, 7 L / 15 LBS Vertical Sausage Machine, Dual-Speed Meat Stuffer, Made of Food-Grade | Silver | Best Buy