VESRAH Front Fork SealsVesrah Oil Seals, many say in the field, do not leak. The secrets are selection of material and precision Japanese design and engineering. Material: Vesrah seals are made of the material specifically defined for Reciprocal motion oil seal by JIS B 2402 4 Standard. This material possesses much higher wear resistance against reciprocal motions than materials used for oil seal for rotation, such as NBR or polyurethane rubber materials. Our material is a