Includes Buffer A, Buffer B, spin filters, spin concentrators, Luer-Lok adapters, Luer-Lok syringes, Microtubes, Caps and plugs, and Luer-Lok needles. Kit contains; 1 x 5185-5987 Buffer A, 1L, 1 x 5185-5988 Buffer B, 1L, 2 x 5185-5990 0.22um spin filters, pk/25