Extended Inclined Plane Kit, Alternate Model - Visual Scientifics Science at Home_General Science Supplies this pair of 440Hz steel

this pair of 440Hz steel forks sits on pine resonance boxes (7

Polaroid film 45 x 23mm sits in 50 x 50mm plastic frames as a matched pair

Plated spring arm with press knob and a single contact stud

the optical glass producing undistorted views of specimens

Double-convex glass lens at 75mm diameter and 150mm focal length

Extended Inclined Plane Kit, Alternate Model - Visual Scientifics Science at Home_General Science Supplies this pair of 440Hz steelUsed in extended track inclined plane investigations, this alternate SKU kit includes the longer ramp, car, pulley, cord, support rod, and sliding protractor the parallel numbered twin of PHVSLFIP.