Useful for joining 4mm (internal diameter) PVC pipes together and for creating offtakes from LDPE pipe using a hole punch. If you intend to primarily use these for joining 4mm pipe together, we recommend our straight connector listing. These are slightly larger than the straight connectors, which feature a bulkhead across the centre to butt against LDPE pipe. All UV stabilised materials for long life. Hozelock compatible.These adaptors are not suitable for use with Rain Bird & Gardena Micropipe.