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Opti-Klear® sight glasses are installed by the leading petroleum trailer manufacturers as original equipment.

JIKOH Mfg., Inc. sells Opti-Klear® brand sight glasses only to OEM's and authorized distributors.

JIKOH Mfg., Inc. has distribution in 31 states, Canada, Mexico, Europe and the Far East to meet your needs. See our "where to buy" page for authorized distributors in your area.