IDT Custom DNA Oligos are available at several synthesis scales and are usually supplied dried down. Therefore, we do not offer the option for a quantity of tubes. Even with our lowest synthesis scale, the yield delivered is sufficient for thousands of reactions with most standard applications. Due to this excess of product, most researchers resuspend oligos as a concentrated stock solution and, from that, create several tubes of working solution. IDT also offers several options for normalization and preparative services. Please contact Customer Care at firstname.lastname@example.org for additional information on custom formulation.