nylon stents and rubber tire absorlute mute when moving without dragging mark, no damage to floor light footed, ... strength and improve efficiency;3, Absolute durable: its service life is longer than ordinary carriers 8 times, 4, Absolute trackless: without ... , high quality natural rubber trundle, and PP polypropylene plate; A, Mute cart is composed of PP plastic sweep, powder coating armrest (foldable ...