Fram, a Honeywell brand, established its filter division in 1934 and by 1997, it had improved the efficiency of a single machine filter to 98 percent. At present, Fangpai's main products are machine filters and air filters, and the sales volume of the two ranks first in the aftermarket in the United States.
 
The sales volume of the square brand in the United States is very large, and the machine filter is also quite popular in China, but the popularity of the square brand air filter in China is relatively low. Fangpai has two series of air filters in foreign countries, Extra Guard and Tough Guard, and most of the ones sold in China are Extra Guard. Extra Guard uses a similar filter paper filtration to the original factory, with a filtration efficiency of more than 99%, an air intake resistance of only 0.35 Kpa, and a dust holding capacity of 178g. Compared with MAN and Mahle, there are not many sales channels in China, and the optional models only match the hot-selling models on the market, with prices ranging from 30 to 50 yuan, and a few models around 100 yuan.