This is a perforated TPU stopper designed to create a seal between a Buchner funnel and a Büchner flask during forced filtration.

It was made from TPU because the material's flexibility allows for a better seal and accommodation of various glassware.

There are internal and external dimensional limits for this stopper to fit well in the Büchner flask and funnel. Therefore, if you use glassware with larger or smaller diameters, you may need to resize the stopper to maintain an effective seal.

Use 30% infill or higher, 4 to 5 walls, and 4 to 5 top and bottom layers to prevent holes in the stopper and its breakage during use.