Wheaton® Solid Black Phenolic Screw Caps with Polyseal® Cone Liner
Wheaton® black phenolic screw caps create a positive seal that protects against product escaping and prevents product contamination by outside substances. Poly seal liner is manufactured from Low Density Polyethylene. The unique Polyseal® cone design provides a wedge type seal that not only seals across the top but also across the inside diameter. This liner is stress crack resistant and offers superior torque retention and excellent sealing characteristics. It is recommended that liner be tested prior to use for leak resistant applications. These screw caps are ideal for use with Wheaton® sample vials and bottles.