Description Our filter adapter cones set come with 9 different diameters and flexible use for various sizes of experimental filtration apparatus. They can be used as a single assembly or used for interlinking apparatus. Made of durable rubber with good elasticity, smooth surface, and wear-resisting. Features - Color:White.- Material: Rubber.- Size: About8.50X8.50X4.00cm/ 3.34X3.34X1.57inch. - These rubber tapered collars can be used singly or nested with adjacent sizes.- Nine different diameters, various sizes to meet your needs, very practical.- Made of premium rubber with good elasticity, smooth surface and hard wearing.- These tapered collars will not flaking or lose particles to contaminate your filtration product.- These tapered collars used for filtration assemblies, together with a flask for filtration.Packing list: 1 Set x Buchner Funnel Flask Adapter Set