ThorLabs PSHA - Adjustable Height Collar for Ø1.5" Posts, 1/4"-20 Locking Screw

Midmark Ritter 270 Series Lab Height Extension Kit, Foot Ring for Stool 272, 276

Lab Jack 8 x 8 in Chemglass Adjustable to 11 in Height

3B Scientific Aerodynamic Lifting Demonstration Model w/ Instructions

Eisco Physics Demonstration Spring Hooke’s Law Force Lab Classroom Science

for lifting Platform Suitable for Middle School Science Experiments 200 mm

Rolling Medical Stool w/ Backrest Adjustable Height Green Vinyl Office Chair.

1 Set Reusable Gas Generator for Science Classroom Educational Demonstrations