Hardwood Test Tube Rack for 12 Tubes, 22mm Rod Size_23.6" 5x clear views through a

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

Six-piece laboratory-glass barware set bundles beaker shot glasses

Cork-lined stainless steel safety flask tongs lock jaws around flask necks to prevent accidental drops during transfer of hot distillation vessels between bench stations

and amplitude

this decade resistance box substitutes for fixed resistors in circuit experiments

Hardwood Test Tube Rack for 12 Tubes, 22mm Rod Size_23.6" 5x clear views through aPolished hardwood test tube rack with a traditional two tier design, holding twelve tubes up to 22 mm diameter for classroom and professional bench setups.