1100% Brand new and high quality. 2Made of premium rubber with good elasticity, smooth surface and hard wearing. 3Used for filtration assemblies, together with a flask for filtration. 4They can be used singly or nested with adjacent sizes. 5Nine different diameters, various sizes to meet your needs.Features:100% Brand new and high quality. 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: RubberWeight: 218gColor: GreenSize: (As pictures shown)1: Top Diameter: 17mm/0.67in; Bottom Diameter: 10mm/0.4in2: Top Diameter: 23mm/0.9in; Bottom Diameter: 15mm/0.6in3: Top Diameter: 29mm/1.14in; Bottom Diameter: 20mm/0.78in4: Top Diameter: 35mm/1.37in; Bottom Diameter: 21mm/0.82in5: Top Diameter: 41.5mm/1.63in; Bottom Diameter: 26mm/1in6: Top Diameter: 49mm/1.93in; Bottom Diameter: 30.7mm/1.2in7: Top Diameter: 61.5mm/2.42in; Bottom Diameter: 42.5mm/1.67in8: Top Diameter: 71mm/2.8in; Bottom Diameter: 53mm/2in9: Top Diameter: 83.5mm/3.28in; Bottom Diameter: 64.5mm/2.54inPackage Includes:9 x Filter Adapter ConeNote: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."