Manifold Extensions expand Orbit s manifolds for additional ports. No tools are required just hand-tighten the fittings to the valve. The O-ring ensures a watertight connection. Orbit manifold fittings are constructed of high-impact and UV resistant polymers. Brand Name: Orbit Product Type: 1-Port Manifold Extension Inlet Size: 1 in. Maximum Pressure: 200 psi Packaging Type: Bagged Material: Plastic