Heathrow Scientific HD29025G 5 Piece Polypropylene 80 Well Microtube Rack Assorted Colors Set Popular fraction collector plate style rack Easily fill and transfer 80 tubes in compact arrangement Polypropylene rack holds 1.5 to 2.0 milliliter microtubes Molded-in coordinates aid organization Set includes 1 box of each of these colors blue, green, yellow, orange and pink