Naylor twinwall ducting offers the advantages of a lightweight flexible product combined with high strength and durability. Produced to the standard BS EN50086-2.4. MetroTwinwall and MetroFlex are designed to meet the required compression strength and are supplied in various colours and markings to suit NJUG recommendations. Manufactured in polyethylene, the pipe is normally supplied in either 6 metre lengths or 50 metre coils. The external corrugated profile gives the product added strength and the internal bore is smooth to prevent cables from snagging. If required, a watertight joint may be achieved by using two profile seals and a push fit coupling.