uxcell PTFE Ball, 18mm Diameter, Ground Finish, Diaphragm Pneumatic Pump White, 5pcs

["PTFE Ball: 18mm/0.71-inch Diameter Polytetrafluoroethylene Balls.","PTFE resists most chemicals, typically withstands high temperatures, and has a low-friction, nonstick surface","For column packing and as mixing beads, PTFE Balls minimize bumping in boiling of corrosive reagents.","PTFE generally withstands higher temperatures than other fluoropolymers, such as FEP and ETFE","Inert to most liquids and vapors, and usable to 550F."]