Description:Application: this kind of pulley is suitable for rock climbing, ice climbing, arbor work, traction, tension system, mountaineering, rescue, survival and other outdoor activities, making your outdoor life more convenient. Safety: This outer pulley is designed with ball bearing and large diameter, which ensures stable and effective sliding, you can use it without worry because it is suitable for both traction and pulling. Reliable: The sliding pulling device can move and slide smoothly, it is not easy to get stuck, just need to quickly attach it to the rope, saving time and strength. Durable: Made of aluminum alloy material, this pulley can be used for a long time because it is durable and not easy to break, no need to change it frequently. Portable: This mountain wheel is easy to store and carry because it is compact and lightweight, it does not take up so much space in your backpack. Specification: Material: Aluminum alloy. Color: green, blue, red. Size: show as pictures. Note: Due to the light and screen difference, the item's color may be slightly different from the pictures. Please allow slight deviation in the measurement data and make sure you do not mind before ordering. Package Included: 1 piece outside the pulley.