Screw cap, phenolic, with open center

Screw cap, phenolic, with open center, black phenolic hole cap, for use with 20 or 40 mL vial with 24-400 thread, pkg of 100 ea

Screw cap, phenolic, with open center, black phenolic hole cap, for use with 22 mL vial with 20-400 thread, pkg of 100 ea

Screw cap, phenolic, with open center, black phenolic hole cap, for use with 7 mL vial with 15-425 thread, pkg of 100 ea

Screw cap, phenolic, with open center, black phenolic cap, for use with 4 mL vial with 13-425 thread, pkg of 100 ea

Screw cap, phenolic, with open center, black phenolic cap (no septum), thread for 24-400, pkg of 144 ea