Product Introduction ‧ aerodynamic design to reduce tremor and wipe reduce friction sound. ‧ additional water repellent features， clearer vision. ‧ 100% natural rubber strips. ‧ dial water glass are also suitable.Wiper deterioration reason Wiper wiper principle Wiper not scrape the surface of the glass rain， but the use of wiper action will scrape into a uniform film of water droplets， so that does not produce light through the twists and turns， to maintain a good line of sight. Dimensions control inch 12 "14" 16 "18" 19 "20" 21 "22" 24 "26" mm 300 350 400 450 475 500 525 550 600 650Use Method ‧ depressed U-shaped clip of fixed charge lever and pull out the wiper arm from the wiper. ‧ The U-shaped wiper arm of the hook set into the rain card folder， until you hear a "click rubbing" sound is complete. ※ clip if they do not， you can not install， replace the original wipers of the card holder.Precautions ‧ this product before use is recommended to the glass surface is dirty， clean and remove the oil film. ‧ wiper arm inadequate or distorted by the pressure， it is possible to wipe the residue produced when using， check the wiper arm. ‧ before purchase， please considerations must be confirmed on the goods.