Offer high elastic rubber casters heavy bracket: arc-shaped design anti steel wrist double track, weight and flexibility is guaranteed. Wheels: Tread imported natural rubber materials, wear-resistant, ultra-quiet, shock absorption, and other functions; nylon wheel core matte surface arc-shaped design, the tread and wheel core more consistent; chrome steel ball bearing wheels and dual and strong impact. Good resilience functions use more effort than other materials. Appearance: with protective dust cover with a black wheel bearing, galvanized metal stents, and more resistant to sunlight, the impact of environmental factors such as temperature changes, dust and rain and the like, generally will not rust within two years. Range: suitable for use on any surface, widely used in industrial product support, logistics and transportation industries. Operating temperature is -45 ~ 80 ℃ wheel surface hardness of Shore 70A-75A bracket installation: flat activity, fixed, side brake, double brake