Spcifications: pack of two inches: 16 millimtre: 400 mm Gross weight: 0.15 kg Silicon composite polymer: the matrix strip is more resistant to aging and heat (not easy twisting and forming), the probability of abnormal noise is reduced by 90% and the durability is increased by 90%. Addition of lubricant: softer and quieter wiping. 99% of scraper seals are not lubricated. Tle steel integr: steel tle integr, Taiwan SK6 steel tle, not easy to form, and the arc is more durable. Fits glass better and is cleaner. Durability is superior to traditional windshield wipers (manganse steel, split steel tle). Metal base Four claws: 99% of wiper seals are fixed with a single shaft or two claws, and seals are easy to fall off during the wiping process. The four-claw metal base makes the connection with the seal firmer and squeeze, and the scratch test is stable. Transparent rubber protective cover: 99% of the rubber protective cover is a protective cover made of lower quality devices such as silver or green. Use the transparent rubber protective cover, it will be stronger and protect the rubber band better.