... wiper blade 2. Teflon coating rubber blade 3. Heavy duty design 4. Casteels tractor wiper blade WIPER SYSTEM EXPERTKM05 HEAVY DUTY WIPER BLADE( tractor wiper blade ) 1.Teflon Coating rubber blade2.Heavy duty ... manufacturer in China, with over 30years' experience in making wiper blade, wiper refill, wiper arm, linkage, wiper motor, washer tank, washer nozzle and washer pump ...