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Eisco Labs Polypropylene Test Tube Rack, Holds 90 13mm Tubes

Eisco Labs Polypropylene Test Tube Rack, Holds 60 16mm Tubes

Eisco Labs Polypropylene Test Tube Rack, Holds 40 20mm Tubes

Test Tube Rack - 18mm x 12 Tube Capacity - Polypropylene Plastic - Autoclavable

Eisco Labs Test Tube Stand, 25mm Diameter Holes for 6 Tubes - Polypropylene