4Pcs Mini Plastic Pulleys 50 mm/1.97inches Diameter Block and Support Pulley line with Iron Frame Student Block Experiment Set Double Pulley System
Special Features
- 【Stable and Durable Performance】- Select the original material, stable performance, Long Service Life
- 【Meticulous Workmanship】- Seiko production, smooth rolling without card, not easy to loose
- 【Meticulous Workmanship】-Seiko production, smooth rolling without card, not easy to loose
- 【Thickened Material is Not Easy to Deform】-Carefully selected raw materials, seiko production, easy to use
- 【Thickened Material is Not Easy to Deform】- Carefully selected raw materials, seiko production, easy to use
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