Aluminum pulley is an insulator for cooling rooms in refrigerators and freezers, and an insulator for air conditioning pipes. It has several uses.

Bissell Upright Vacuum Cleaner PowerForce with Rotating Brush: Helix PowerForce Technology, Powerful Suction, Versatile Height Adjustments, Edge-to-Edge Cleaning, Efficient Dirt Separation, Lightweight and Maneuverable Design 1 L 1100 W BISM-2111E Blue/Black/Silver