Optically Worked Double Convex Glass Lens, 75mm Diameter, 300mm Focal Length, Alternate Model Capacity_125mL sized for student-bench stability during

sized for student-bench stability during routine glassware assembly

Spring-loaded vinyl jaws open to 2

suited to transferring crucibles around open-flame chemistry work

Autoclavable polypropylene draining basket measuring 40 by 40 by 11 cm

this low-current 2mA buzzer on a demonstration base sounds whenever current flows through the closed circuit

Optically Worked Double Convex Glass Lens, 75mm Diameter, 300mm Focal Length, Alternate Model Capacity_125mL sized for student-bench stability duringAlternate model 75mm double convex glass lens at 300mm focal length, the optically worked surfaces and ground polished edges parallel to the main line 300mm focal lens for backup stock use.