Spec: Item Type: SPA Massage Jet Nozzle Use: Suitable for spa tub, hot spring pool, hydrotherapy pool. Material: Stainless Steel, PVC Size: Approx. 100 x 98mm / 3.94 x 3.86in Caliber: Large Caliber Outer Diameter: Approx. 22mm / 0.87in, Small Caliber Outer Diameter: Approx. 11mm / 0.43in Weight: Approx. 155.00g / 5.47oz How to Use: Install and use according to applicable specifications. Package List: 1 x Massage Tub Jet Nozzle