Multi-flex risers allow you to connect from a fitting, typically under the ground, to a hose faucet, drip manifold, shrub head, spray head, impact sprinkler, or gear-drive rotor. The semi-Multi-flex risers allow you to connect from a fitting, typically under the ground, to a hose faucet, drip manifold, shrub head, spray head, impact sprinkler, or gear-drive rotor. The semi-flexible material of the riser is ideal for tight places where the riser may be under constant, minor flex. The male x male version has male pipe thread (MPT) ends which connect from a PVC tee or elbow with a female outlet to a sprinkler head with female inlet. The male x female version is for adding an extension to a flexible riser or PVC riser. For applications which require longer flexible risers, we recommend Blu-Lock pipe and fittings. For non- constant pressure outdoor irrigation use with cold water only. From the Manufacturer This flexible tubing riser allows bending but resists breaking, making it a great option for placing sprinkler heads in hard-to-reach and out- of-the-way areas.