Disposable crack-resistant, modified polystyrene tubes with reinforced tip for extra strength Withstand centrifugal forces to 1750 × g Unique sediment-trap tip provides a standardized 0.40mL sample volume Graduated to 12mL Capacity 15mL Diameter 15mm Order Info Snap-on caps sold separately (14-377-254, 14-377-255, 14-377-256, 14-377-257, 14-377-258)