US$ 29.98
variable valve timing (VVT)
attraction
Autoclavable polypropylene test tube stand holding six 25-mm tubes with six drying pins on the back
Optically-worked glass double convex lens with a 150mm focal length and 1
a 125 by 65 by 18mm acrylic rectangular block with beveled edges widens the visible refraction shift in Snell's law setups
Variable-Angle Glass Prism, 30° x 60° x 90° prop65 variable valve timing (VVT)Right triangle 30 x 60 x 90 glass prism, the standard 30 60 90 geometry giving classic deviation behavior for comparing against equilateral and wedge geometries.