6-Model Placentation Types in Flowering Plants, 16 x 12" Base Stock Type_Stocked Flat head solid cone stopper

Flat head solid cone stopper in borosilicate glass features 24/29 cone for sealing ground joint vessels and chemistry apparatus

Larger 100 x 12 x 15mm Alnico horseshoe steps the pole-gap geometry up from the 75mm model

Built for heat and abrasion resistance

Erlenmeyer Flask with a 1000mL capacity and narrow neck is made of heavy-duty borosilicate 3

and gas control on natural gas for high-temperature chemistry heating applications

6-Model Placentation Types in Flowering Plants, 16 x 12" Base Stock Type_Stocked Flat head solid cone stopperSix placentation patterns marginal, parietal, axile, free central, basal, and superficial mount side by side for comparative angiosperm reproduction teaching.