This is a very popular and handy device. It allows you to safely extend the length of your power cables and the join is even safe underwater when mated. With this joiner you can simply attach/remove the joined electrical cable and item with a simple pull. This is very handy if you want to remove your pond pump in winter. The joiner ships with a cap included to protect the exposed joiner when an attachment is removed.
Takes cables from 5mm up to 9mm in diameter. Seals to IP68 standard.