KOK has many different oil seal materials and types. Therefore, for an oil seal to show its capabilities, it is imperative to understand its operating conditions and then to choose the mos suitable oil seals. KOK understand the importance of good quality oil seal. They build their seal with high precision, using automated production machinery, and also state of the art testing equipment to test specific oil seal functions. It has reciprocating seals, hydraulic seals, rotary seals, pneumatic seals, and bonded seals.