300mm Red 4mm Stackable Connecting Lead with Nickel-Plated Pins Lab Supplies_Spring Scales this object screen provides a

this object screen provides a stable projection surface for ray diagrams and lens investigations in physics coursework

dermal papillae

5x clear views through a 3-inch optical-glass lens with a 6-inch focal length

preventing blowouts while anchoring the unit against accidental classroom contact

demonstrating plaque removal during dental hygiene lessons

300mm Red 4mm Stackable Connecting Lead with Nickel-Plated Pins Lab Supplies_Spring Scales this object screen provides aStackable 300mm red 4mm lead with nickel plated split hollow pins on both ends, providing the standard mid reach branching wire for 4mm socket student bench circuits.