28-400 White PP Flat Screw Top Caps with PTFE Foam Liner
White polypropylene screw cap is conveniently ribbed for easy handling with a clear surface for writing on cap. PTFE faced foamed polyethylene liner offers excellent chemical resistance. Polyethylene foam provides compressibility and sealing properties. Extremely chemical resistant and good for high purity chemicals, strong acids, and solvents. Also, excellent for environmental samples, pharmaceuticals and diagnostic reagents.