A set of 419 green color o-rings for air conditioners sealing applications
The O-rings are characterized by its good resistance to high temperatures, most chemicals, solutions and gases.
The kit includes all the most popular sizes of o-rings used for air conditioning.

18 sizes standard 270cs green HNBR o rings packed in a handy storage plastic transparent case .materials available in NBR, HNBR, Silicon or FKM. The o rings havs character of Wear resistance, corrosion resistance and high temperature resistance. Great for personal and professional workshops, garages, and plumbing services.

32 sizes Inch standard 419cs o rings packed in a handy storage plastic case in red, yellow or blue color. materials available in NBR, Silicon or FKM.

32 sizes metric standard 419cs o rings packed in a handy storage plastic case in red, yellow or blue color. materials available in NBR, Silicon or FKM.

32 sizes SAE or inch standard 407pcs o rings packed in a handy storage plastic case in red, yellow or blue color. materials available in NBR, Silicon or FKM.

30 sizes metric standard BOXH 404pcs o rings packed in a handy storage plastic case in red, yellow or blue color. materials available in NBR, Silicon or FKM.

30 sizes AS568 standard 382pcs BOXG imperial size o rings packed in a handy storage plastic case in red, yellow or blue color. materials available in NBR, Silicon or FKM.

30 sizes metric standard 386pcs o rings packed in a handy storage plastic case in red, yellow or blue color. materials available in NBR, Silicon or FKM.

30 sizes JIS standard 382pcs o rings packed in a handy storage plastic case in red, yellow or blue color. materials available in NBR, Silicon or FKM.

30 sizes AS568 standard 382pcs o rings packed in a handy storage plastic case in red, yellow or blue color. materials available in NBR, Silicon or FKM.

Nitrile rubber O-ring is a commonly used sealing material, mainly composed of acrylonitrile (ACN) and butadiene copolymer, in which the content of acrylonitrile has a significant effect on the performance of nitrile rubber. When the acrylonitrile content is high, nitrile rubber has excellent oil resistance and resistance to non-polar solvents, but also has good mechanical properties and air tightness, nitrile rubber O-rings are used in a wide range of temperatures, The general grade can be used between -40 ° C and 100 ° C, and special grades can withstand the temperature range of -55 ° C to 125 ° C (in oil). Its hardness range is from A40 degrees to 93 degrees with a variety of colors are available.
Nitrile rubber O-rings play an important role in many industries due to their excellent oil resistance and adaptability, and are a common choice for sealing solutions.

Fluorine rubber o ring is a kind of sealing o rings which is widely used in automobile, ‌ electronics,‌aerospace,‌ship and other industries that require high precision,high temperature resistance, ‌high wear-resistant working environment. ‌Fluorine rubber o-rings have excellent chemical resistance, ‌can resist most oils and solvents, ‌ especially all acids, ‌aliphatic hydrocarbons,‌ aromatic hydrocarbons and animal and vegetable oils. ‌However, FKM o rings are not recommended for ketones, ‌low molecular weight esters and nitro-containing mixtures. ‌In addition, Fluorine rubber also has high temperature resistance and chemical corrosion resistance, and has good aging resistance and ozone resistance with low permeability. Even under very harsh working conditions, It still has very good wear resistance.
Fluorine rubber o-rings have become an indispensable part of industrial production due to their excellent performance and diverse applications.

Hydrogenated nitrile butadiene rubber (HNBR) is a kind of nitrile butadiene rubber with high saturation. Compared with traditional nitrile butadiene rubber (NBR), Its molecular structure does not contain carbon-carbon double bonds (C=C). HNBR not only inherits the traditional oil resistance, wear resistance, low temperature resistance and other properties of NBR, but also has better heat resistance to oxygen aging, ozone resistance, chemical resistance and good dynamic properties, So it is considered to be one of the most potential rubber varieties at present. In the world, The application of HNBR has been widely involved in many industrial fields such as automobiles and oil fields, especially in the automotive transmission belt with market share more than 50%.

The EPDM o ring is made of ethylene and propylene copolymerization, and the main bond does not contain double bonds, so its heat resistance, weather resistance and ozone resistance are excellent. When the ozone concentration is 100×10(pphm), There is no long crack in 2430 hours, and the outdoor life can reach more than 25 years. In the water vapor of 160 ° C,  EPDM rubber also shows excellent performance than other general rubber, and it also has good resilience and insulation properties.

Silicone O rings are made of silicone atoms and corresponding oxygen atoms. Due to the strong covalent bond between silicon and oxygen atoms, silicon o rings are highly resistant to heat than other elastomers and are excellent seal materials for static, high temperature applications. Featuring outstanding flex and fatigue life, ozone and UV radiation resistance, physiologically neutral and insulating properties, silicone o-rings are effective in a wide range of applications.