Rubber washer 1. Ozone proof rubber seal 2. Good insulation property 3.Certifiication:ROHS 4.OEM/ ODM highly welcom Rubber parts1.materials NBR, silione, NR, FKM, etc2.types Types of O-ring, E-type, U-type, etc, can make on your size3.quality Good4.price lower and competitive5.color Black, red, white, yellow, brown, green, violet, etc, depending on your own order6.OEM welcomed