U-seals can be used for Heavy-duty, Medium-duty and Light-duty.Besides, we have two differnet dust wipers. One is high-grade dust wiper with support on the lower side without metal case, and the other one is high-grade dust wiper with metal case. With their superior functions in resist grease leakage and dust, both items are your one-and-only choice for application in civil engineering and hydraulically operated units.