Double Convex Lens, Highly polished, optically true lens is excellent for physics classroom demonstrations in optics and light refraction, with ground edges, great for physics classrooms, with highest grade, Size: 250 mm focal length, Lens measures 1.5in diameter, 0.2 weight
With Galvanized Steel Stanchion. Has stainless steel basin. Shower has 20.3cm diameter head with impeller action and stay-open valve. Six aerated outlets in each spray head provide 22.8x20.3cm curtain of aerated water. Meets ANSI Z358.1-1990 standard.
With Stainless Steel Stanchion. Has stainless steel basin. Shower has 20.3cm diameter head with impeller action and stay-open valve. Six aerated outlets in each spray head provide 22.8x20.3cm curtain of aerated water. Meets ANSI Z358.1-1998 standard.
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