Thread: 13mm Opening: 8.5mm center hole or closed top Key Models:
SC131131: Pre-opened white PTFE/red silicone
SC134132: Closed top natural PTFE/silicone
SC133131: Three-layer PTFE protection
Thread: Fits 8-425 ND8 Opening: 5.5mm center hole or closed top Key Models:
SC81181: Pre-opened white PTFE/red silicone
SC8182: Closed top cap for volatile storage
SC8183: White cap for easy visual monitoring
