Krono Windy City Gyrokone -- 4 per case.

3B Scientific GmbH 1000598 Diffraction Objects 2 3 4 5 Fold Slits and Grating, Grade: Kindergarten to 12

Rogvoc 3 Gallon Vacuum Chamber, 201 Stainless Steel Degassing Chamber with Acrylic Lid and 4.9 ft Hose, for Resin, Silicone, Epoxy, Plaster Degassing and Wood Stabilization Projects

BVV 3 Gallon Wide Stainless Steel Vacuum Chamber with Reversible Silicone Gasket, Glycerin-Filled Gauge, 50-Micron Air Filter, Degassing Chamber with User-Friendly Connections - Made in USA

3 Gallon Vacuum Chamber with Lid Degassing Chamber, Stainless Steel Vacuum Chamber for Stabilizing Wood Degassing Siilicones Epoxies and EssentialOiils

VEVOR 5 Gallon Vacuum Chamber Stainless Steel Vacuum Degassing Chamber, 160F Acrylic Lid Kit Vacuum Chamber, Vacuum Degassing Chamber Kit

3 Gallon Acrylic Vacuum Chamber Acrylic Clear Perfect for Stabilizing Wood, Degassing Silicones, Epoxie

Vacuum Jar, Vacuum Chamber with Pump, Laboratory Plastic Jar Sound Physics Scientific Experimental Tool for Sound Propagation Experiment

2 Gallon Acrylic Vacuum Chamber Acrylic Clear Perfect for Stabilizing Wood, Degassing Silicones, Epoxies