Single Pulley 4"H Black Plastic with Metal Housing Hooks Top & Bottom Pack of 20 By GSC International Inc.

This pack of 20 Single Pulleys is perfect for physics classrooms, STEM labs, and DIY mechanical projects. Each pulley features a 50mm black plastic wheel housed in sturdy metal for smooth rotation and reliable mechanical demonstrations.

Hooks on both the top and bottom of each pulley allow easy attachment to cords, weights, or other apparatus, making them highly versatile for educational or workshop setups. Their compact and lightweight design ensures convenient handling and placement during experiments.

Built for long-term use, this set of pulleys provides durability, reliability, and flexibility for repeated experiments. Ideal for students, teachers, and hobbyists, these pulleys are a practical solution for bulk educational and mechanical applications.

Key Features:

• Reliable Mechanical Performance: Smooth rotation with durable plastic wheels | Full Dimensions: 4"H x 1.875"L x 0.5"W
• Versatile STEM Tool: Pack of 20 perfect for physics experiments, mechanical demonstrations, and educational projects
• Easy Attachment: Hooks on top and bottom allow secure and flexible setup in labs or DIY projects
• Compact & Lightweight: Simple to handle, transport, and store for classroom or workshop use
• Durable Construction: Plastic wheels with metal housings ensure long-term reliability for repeated experiments