2-Piece Adjustable Polarizing Filter Set for Optical Bench, 5 x 3.75" Item Type_Bug Viewer tightened with an Allen wrench

tightened with an Allen wrench for constructing lattice frameworks on laboratory benches

variable valve timing (VVT)

Wear-replacement timer switch for the goggle sanitizer cabinet

letting students measure rotational distance against linear advance to derive the mechanical advantage of the spiral

Ratchet-stopped nickel-plated brass 25 mm micrometer screw gauge reading to 0

2-Piece Adjustable Polarizing Filter Set for Optical Bench, 5 x 3.75" Item Type_Bug Viewer tightened with an Allen wrenchAdjustable polarization across two filters measuring 5 x 3. 75 x 1 inches each, dimensioned to drop into the PH0652 optical bench for hands on study of Malus's law and crossed polaroid extinction.