Celltreat's new 15mL polystyrene tubes are optically clear for easy viewing of your samples. Sure Caps feature a compressible liner to create a stable seal. Tubes include a molded 15mL graduation line as well as 0.5 and 1mL graduations molded into the conical bottom, allowing for small volume quantification. Frosted marking area. Max Force (RCF) is 3,000g. Packaged 25/bag, 500/case.