Features
* Internal steel support structure, not all-plastic casters
* TPR tread, material hardness reaches more than 80°, wear-resistant, quiet, and good hydrolysis resistance
* ABS cover dirt-resistant and easy to clean
* 2 functions: free + total lock ; 3 functions:
* 30° brake angle or 45° brake angle
Testing
* Running test 20,000 meters
* Slope test (10°) No sliding
* Load test (single) Dynamic 120kg, static 250kg
* Obstacle test Set up a 20mm high obstacle and hit the caster back and forth 10 times without any abnormality
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