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8 Pcs Test Tube Rack 4 Way 0.5ml/ 1.5ml/ 10ml/ 15ml/ 50ml Interlocking Multi PCR Tube Rack Stand Plastic Polypropylene for Centrifuge Lab Scientific Experiments Supplies Dog Collar Set bonsai because of its abrasionSufficient Quantity: you will receive 8 pieces 4 way test tube holders in 4 different colors, including blue, orange, green and yellow, 2 pieces for each color; They are enough for you to store multiple test tubes at the same time without working about lack of space Size Information: this test tube containers have different sizes in different sides, the first side can store 4 test tubes and is suitable for 50 ml test tube, the second side can store 12