Sight glass offers insight to lubricant condition

Luneta’s new Sight Glass has all the clarity and durability you need, with none of the leaks, cracks or squinting you may be used to with those old-style sight glasses. You’ll never have to use fragile, dark, hard-to-read sight glasses again. It comes in 8 English sizes from 0.25 to 2 inches and 10 metric sizes from M10x1.0 to M33x2.0.

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