Filter Adapter Cones Rubber Stopper Buchner Funnel Flask Filtration Set Features: . Made of premium rubber with good elasticity, smooth surface and hard wearing. Used for filtration assemblies, together with a flask for filtration. They can be used singly or nested with adjacent sizes. Nine different diameters, various sizes to meet your needs. Specification: Material: Rubber Weight: 218g Color: Green Size: (As pictures shown) #1: Top Diameter: 17mm/0.67in; Bottom Diameter: 10mm/0.4in #2: Top Diameter: 23mm/0.9in; Bottom Diameter: 15mm/0.6in #3: Top Diameter: 29mm/1.14in; Bottom Diameter: 20mm/0.78in #4: Top Diameter: 35mm/1.37in; Bottom Diameter: 21mm/0.82in #5: Top Diameter: 41.5mm/1.63in; Bottom Diameter: 26mm/1in #6: Top Diameter: 49mm/1.93in; Bottom Diameter: 30.7mm/1.2in #7: Top Diameter: 61.5mm/2.42in; Bottom Diameter: 42.5mm/1.67in #8: Top Diameter: 71mm/2.8in; Bottom Diameter: 53mm/2in #9: Top Diameter: 83.5mm/3.28in; Bottom Diameter: 64.5mm/2.54in Package Includes: 9 x Filter Adapter Cone Note: 1. Please allow slight error due to manual measurement.Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.