12-Hole Test Tube Stand for Mixed 30mm and 15mm Tubes, Polyethylene Subcategory_Geology Models 7 oz with a threaded

7 oz with a threaded removable brass hook

Pocket-sized 45mm aluminum compass with a graduated dial

Used to dissipate heat during sustained high-current work

supplying the standard short-reach patch wire for student-built 4mm-socket circuits at the bench

Beech wood test tube rack holds 12 tubes up to 20mm diameter in a 9-inch frame for organized storage during chemistry and biology experiments

12-Hole Test Tube Stand for Mixed 30mm and 15mm Tubes, Polyethylene Subcategory_Geology Models 7 oz with a threadedFlat pack polythene test tube stand with six 30 mm and six 15 mm holes, disassembling for easy cleaning between uses in chemistry classrooms and student laboratories.