Glass Lens Set, 2", 6 Optical Types Material_Cork Heavy-duty spring-loaded three-finger jaw with

Heavy-duty spring-loaded three-finger jaw with dual-screw fine adjustment mounts on a swivel boss head accepting 18mm rods

and triple-parallel plastic wheels at 50mm diameter in low-friction ball-bearing steel frames

Zinc die-cast body with non-toxic powder coating mounts vinyl-coated four-prong jaws on a 5

and horseshoe magnet that swap by hand

this seven-piece set traces fetal delivery from engagement through crowning to placental separation for labor and delivery teaching

Glass Lens Set, 2", 6 Optical Types Material_Cork Heavy-duty spring-loaded three-finger jaw withGround, polished, and packaged as a single optics kit, this six lens glass set covers double convex, double concave, plano convex, plano concave, and concavo convex forms for classroom work.