Penny Head Solid Cone Stopper, 24/29, Borosilicate Glass Diameter_200mm Stackable grid base on this

Stackable grid base on this polypropylene test tube rack holds 60 tubes up to 16 mm across a 9

Copper replacement rod at 19-11/16 by 1/4 inch sized for thermal linear expansion apparatus

collecting water displaced by a submerged object for volume calculation in Archimedes-principle demonstrations

closing the circuit only while the button is held to introduce momentary-contact behavior alongside latched switches

Penny Head Solid Cone Stopper, 24/29, Borosilicate Glass Diameter_200mm Stackable grid base on thisPenny head solid cone stopper in borosilicate glass features 24 29 cone for sealing ground joint vessels with finger grip top design.