Made of steel, one solid design, housing bore surface roughness 1.8 μmRa When it comes to choosing new spark plugs for your car, it is important to consider both cost and quality. While cheaper spark plugs may seem like a more cost-effective option upfront, they may end up costing you more in the long run if they need to be replaced more frequently. Investing in high-quality spark plugs made of premium materials can help improve your car's performance and fuel efficiency, ultimately saving you money in the long term.
- the material). After hydrogenation reaction, due to the change of molecular structure, the elasticity of HNBR
ERIKS type R (type A according to the DIN standard) is identical in shape to type M, but has a rubber outer case with metal reinforcement on the inside. The rubber creates a good seal in the housing, even if the housing has suffered minor damage or is not in its best condition for other reasons. The RST version has a dust lip. These types are often chosen to replace a type with a metal outer case because they are easier to install and can cope with minor damage to the groove, such as scratches.

Type B Oil seals



14x24x6 oil seal. They are designed to withstand high temperatures and pressures, as well as the friction and heat generated by rotating shafts.
Figure 4 shows the features of a JTEKT oil seal.
Rubber covered

Overall, the cost of new spark plugs can vary depending on a variety of factors. By understanding the factors that contribute to the cost of spark plugs, you can make an informed decision that best fits your budget and needs. Whether you opt for cheaper spark plugs or invest in premium options, it is important to prioritize quality and longevity to ensure optimal performance for your vehicle.