Round Lycron Polymer Plugs & Insert Blocks.
Designed to be an interference fit in existing circular holes (cast or core drilled), pipes or ducts. The inner portion of the plug is square, and will accommodate a number of insert blocks.,The "flexible" insert blocks are available in seven specific sizes, each of which will accommodate five progressive sizes of cable (or pipes). Between them, these "flexible" blocks will cover the cable diameter range of 3·5mm to 38·5mm. The "U" section and solid blocks are designed to take up any gaps within the plug. The "U" section blocks are designed to "slot" into each other (into the next size up), and the "flexible" blocks will fit an appropriate "U" block. Where there is a demand for enhanced safety within an installation application, the plugs may be inserted back to back, providing an "external" and "internal" seal. #Fire_Resistant_Cable_Transit