These mesh products are widely used for a variety of Drosophila applications. All of our mesh is conveniently sold by the linear foot from 40-48in rolls, so you can order just what you need. Each unit of measure comes as a contiguous 40-48in x 1ft sheet. For example, an order of 3 units from a 40in Roll, will be shipped as a 40in x 3ft sheet. Custom sizes can also be cut, please call or email us for pricing. Genesee Scientific has access to over one thousand different pore sizes, so if the one you need is not listed please contact us and tell us the application. We will gladly make it available to you and to the rest of the Drosophila research community.