SBPCRWF-4WT 4 tubes with 4 covers 250*4strips/box 29 X 19.5 X 21 4-STRIPS PCR TUBE WITH 4-STRIPS CAPS(TRANSPARENT) Made From virgin polypropylene. Compatible with most thermal cyclers. Certified DNase, RNase&Pyrogen free. . Eight individual caps can effectively prevent mutual infection. 2. High grade of transparency Flat Caps. 3. 0.1ml and 0.2ml are available. 4. 250strips/bag, 10bags/ctn.