Adapter for washing machines that generates bubbles smaller than 1μm, improving cleaning power. - Product Name: Nano-bubble generating adapter for fully automatic washing machines - Material: Brass, chrome plating - Size: Compatible with G3/4 thread size for water inlets - Features: Nano-bubble effect that generates bubbles smaller than 1μm Thank you for viewing. I am selling this because it did not fit my washing machine after connecting it and running a test. Includes the original box (with some tears) and instruction manual. Please check the size and understand that this is a used item before considering a purchase.