Hexagonal Hollow Stopper with Flat Bottom, 29/32, Borosilicate Glass Plastic Labware_Plastic Burettes sized for individual student-lab use

sized for individual student-lab use in simple-machines units

5-inch inner ring for seating wire gauze and vessels during classroom heating

7 inches with five 50mm steel spheres

the 90-45-45-degree faces redirecting wider beams for total internal reflection and image-inversion work

Eye model seated in a bony orbit socket illustrates the protective skull relationship of the eye alongside its internal anatomy in a combined teaching unit

Hexagonal Hollow Stopper with Flat Bottom, 29/32, Borosilicate Glass Plastic Labware_Plastic Burettes sized for individual student-lab useHexagonal hollow stopper in borosilicate 3. 3 glass features 29 32 cone with flat bottom for sealing ground joint vessels and chemistry apparatus.