Metal Bearing Pulley Block With Two Plastic Wheel. Features: 1.Every Product Has a Unique Manufacturing Part Number Label on the Inner Package That Proves It Has Been Qualified,which Include Part Number,Model Number and Inspection Date Information; 2.If You Have Any Questions About the Item,please Provide Us the Manufacturing Part Number for Checking,your Profits Will Be Guaranteed. 3.10 Pulleys in One Pack. 4.Made of Iron and Plastic, with Bearings Inside It, Move Smoothly and Durable. 5.Suitable for Your Wardrobe, Bookcase, Glass Cabinet and Other Office Furniture. 6.Note: The Wheel Dia is 19mm, Please Measure Your Furniture to Make Sure the Pulley Meet Your Needs Before You Purchase. Specifications: Material: Iron & Plastic Color: Silver & White Size: 4.5x1.9cm/1.77x0.74inch(LxDia) Wheel Dia: 19mm Weight: 157g Package Include: 10x Pulley Blocks. We are an international based seller that will ship your order from abroad, please at least a minimum 14 working days for delivery right now due to the ongoing delays in shipments globally.