Nickel-Plated Brass Micrometer Screw Gauge, 0-25mm StockedLY9121 Jumbo-sized for heavier apparatus

Jumbo-sized for heavier apparatus

Polished beech wood test tube rack with twelve vertical holes sized for tubes up to 28 mm diameter

Slotted with a central well on each glass

Plastic-bodied wave apparatus with eccentric discs that drive metal rods up and down as the handle turns

Sodium chloride lattice kit with 27 color-coded gray and green atoms plus 54 connectors for building the full cubic NaCl crystal structure in three dimensions

Nickel-Plated Brass Micrometer Screw Gauge, 0-25mm StockedLY9121 Jumbo-sized for heavier apparatusRatchet stopped nickel plated brass 25 mm micrometer screw gauge reading to 0. 01 mm with 0. 003 mm accuracy at 10 mm, supplied in a storage case for student precision work.