A porcelain Buchner funnel with a thin stem is a laboratory tool used for filtration of liquids and suspensions. It consists of a porcelain funnel with a perforated plate at the bottom and a stem that allows it to be attached to a flask or filter paper. The thin stem provides a more compact and space-saving design compared to a traditional Buchner funnel with a thick stem.

Porcelain is a common material for Buchner funnels due to its high resistance to chemical corrosion and its ability to withstand high temperatures. Buchner funnels with thin stems are commonly used in chemistry, pharmaceuticals, and other laboratory applications where filtration of liquids and suspensions is required.

They provide a cost-effective and convenient solution for filtration in laboratory settings.