Easy to apply and remove, this protective and durable lid for reservoirs is ideal for general use in your laboratory as a means of ensuring purity in your solutions. Lids fit all sizes of Axygen "reservoirs":/categories/Reservoirs and "deep well plates.":/categories/deep-well-plates Best used when repeatedly opening and covering samples. For longer term sealing options, you should evaluate "AxyMat Sealing Mats":/categories/sealing-mats-and-films or "PlateMax Sealing Films":/categories/platemax lid-for-reservoirs-and-deep-well-plates 300 true Lid for Reservoirs and Deep Well Plates