STANDARD CONNECTION: the male connection of our pull down faucet head is 20.5mm or 0.8" or 13/16"(outer diameter), NOT 1/2", the inside diameter is 14mm or 9/16". Only designed for a STANDARD TYPE OF PULL OUT HOSE, please check your set up before ordering.FIT BRANDS (Put-Down Kitchen Faucet) 100% FIT for WEWERULIAOWOFANFORIOUS, APPASO, ArofaGIMILIAIMIDIKINFAUCETVESLA HOMEBZOOSIUKINGO HOMECORLSLYBESyPeppermintVFAUOSITAMAZING FORCECasavillaComllenNtipoxAguaStellaIncluding but not limited to. 50% Fit for DELTAKRAUSPfisterKohler. Only 10% Fit for Moen.EASY TO SWITCH WITH 4 MODES:our kitchen sink sprayer head has FOUR functions, Stream, Double Row Shower, Double Spary and Double Blade.For example, when washing fruits, using the Double Spary Mode can save 50% water. When washing dishes or sink, you can use the Double Blade Mode with stronger scouring force.You can quickly switch between different functions by turning the function ring and pressing the function button.GOOD QUALITY AND WELL MADE: nicely constructed of engineering-grade ABS plastic with premium brushed nickel finish for durability, effectively withstands daily rust and tarnishing, providing everyday convenience for different rinsing/filling purpose.EASY TO INSTALL WITHOUT ANY TOOLS: it's very easy to install this pull out faucet spray head, you just need to unscrew the original one and screw it on.