NEBNext Multiplex Oligos provide adaptors and primers to enable high yield multiplex Illumina library production. Unique Dual Index (UDI) primer pairs enable the identification and mitigation of the impacts of index hopping when using a patterened flow cell. The unique hairpin loop structure of the NEBNext Adaptor minimizes adaptor-dimer formation, and NEBNext index PCR primers enable index incorporation during library amplification. This kit includes 96 pre-mixed unique pairs of i5 and i7 index primers, packaged in a single-use 96-well plate with a pierceable foil seal. Additional NEBNext Multiplex Oligos products are available for different indexing strategies.