Who sells a payne permeability cup?

Payne permeability cups are typically sold by specialized scientific suppliers and companies that cater to laboratory equipment and materials for soil and geotechnical testing. Notable suppliers include companies like Geotechnical Testing Equipment, Gilson Company, and various online marketplaces like Amazon or eBay. Additionally, university laboratories and research institutions may offer them for sale or recommend specific vendors. Always check for the latest suppliers for the most accurate options.