Hardwood Test Tube Rack for 12 Tubes, 22mm Rod Size_23.6" this ray box gives students

this ray box gives students a controllable light source for reflection

Triple tandem plastic pulley with 25/38/50mm ball-bearing wheels on an open-sided 17

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

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

Hardwood Test Tube Rack for 12 Tubes, 22mm Rod Size_23.6" this ray box gives studentsPolished hardwood test tube rack with a traditional two tier design, holding twelve tubes up to 22 mm diameter for classroom and professional bench setups.