The window and body are made from a single piece of plastic, making these sights more shatter resistant than sights with a glass window.

Machined from one piece of stain- and impact-resistant plastic.

Continuously monitor oil quality through the clear plastic reservoir, and use the attached drain valve to remove water accumulation.

Press these sights into a hole in your tank wall; no additional mounting nuts are needed. They mount from the outside.

Fasten the extended flange to tank walls.

Add a window to your high-vacuum system. With a pane of borosilicate glass sealed inside a high-vacuum CF flange, these sights bolt onto vacuum chambers, tee fittings, and manifolds.