Simple Machines Gear Rack Model Pack Size_12 Two pith balls suspended on

Two pith balls suspended on unspun silk from a brass pillar

Twenty-nine labeled features across outer

Wall-mountable beech wood draining rack measures 20 x 20 inches and holds up to 90 pieces of labware inverted for post-wash drying in chemistry labs

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

Twelve-slot natural wood buret rack organizes vertical buret storage and simultaneous titration setup in chemistry and analytical laboratory classrooms

Simple Machines Gear Rack Model Pack Size_12 Two pith balls suspended onRotation to linear gear rack simple machine model converting circular gear motion into straight line rack travel, demonstrating the mechanism behind crankshaft pistons and steering racks.