1.  LED faucet nozzle                                                                                                                     2.material :brass                                                                                                                                                                        3. No battery needed , just for water power .                                                                                    4.  With the water temperature can change color .  below 29 degree -green light ; 30-39 degree - blue light ; more than 40 degree - red light .                                                                                                                                                         5. whatever size of the screw   we can make for you .