18 x 49 ironing board cover_extra large ironing board cover

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.

Lever the seal out with a screwdriver, working carefully to avoid scoring the seal housing.

Spark Plug China: Wholesale and Manufacturing

Choosing and using the proper sealing devices within oil and gas applications can be vital when preventing dirt, dust, water, and other debris from potentially getting inside and contaminating products. 

(6) Note that there should be a certain amount of lubricating oil on the lip of the oil seal.