Constructed of premium grade polyurethane. Protects against electrostatic discharge that can be generated by transport. The material allows static electricity to flow through the caster wheel tread and release into conductive flooring, which is perfect for units used within manufacturing plants or discharge-safe areas where electrostatic build-up is an issue. White tread color. 87 (+/-5) shore a. Wheel core is constructed of water resistant aluminum.<br>Features:<br>* Order by 6 pm for same day shipping.<br>* Constructed of premium grade polyurethane.<br>* Protects against electrostatic discharge that can be generated by transport.<br>* Quantity quotes available.<br>Order online from Box Partners today.