Specifications:They are best clogged mist nozzles replacement for DIY homemade low pressure greenhouse, umbrella, patio mist systems, outdoor cooling systems.Copper body with self-sealing o-ring is leak-proof, no tape or sealant is required. They fit for 1/4inch misting hose.Please clean nozzles periodically by soaking them in vinegar & warm water solution, and replace sediment filters (not included),remove them at the end of the season. Type: Fog Nozzles KitMaterial: CopperQuantity: 23 Pcs/SetFeatures: Durable, Water Saving, Moisturize, Easy to InstallNozzle Size: 4cm x 0.7cm/1.57 x 0.28 (Approx.) Notes:Due to the light and screen setting difference, the items color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement. Package Includes:12 x Fog Nozzles10 x Holder1 x Plug