?Product name?: shower head restrictor ?Color? as shown ?Material?: stainless steel + plastic ?Specifications?: set of 7 ?Installation method?: screw in ?Treatment process?: electroplating process ?Product size?: outer teeth diameter: 2cm, inner teeth diameter: 1.47cm, overoll diameter: 2.35cm, height: 2cm ?Packing list?: 1pcs 1/2 NPT shower flow control valve 6pcs shower flow restrictors with different water flow specifications(1.2/ 1.5/ 1.8/ 2/ 2.2/ 2.5 gallon/min). SHOWER FLOW REGULATOR KIT - This kit includes a 1/2 NPT shower flow control valve and 6 shower flow restrictors with varying specifications to fit most household showers. COLOR-CODED SPECIFICATIONS - Each shower head flow restrictor comes in a different color to easily identify its water flow specification, ranging from 1.2 to 2.5 gallons per minute. QUALITY MATERIALS - This water restrictor for shower head is constructed with quality stainless steel and plastic, ensuring long-lasting durability and resistance to breakage and leaks. UNIVERSAL FIT - With a diameter of approximately 24mm and a length of 22mm, this shower restrictor is suitable for most standard-size shower heads. ENERGY-SAVING DESIGN - By reducing water flow, this shower flow reducer helps save energy for heating water. It's also user-friendly, allowing you to easily control the water flow rate.