The hansgrohe air gap is necessary for kitchen faucet installation in certain cities. Please check with your local codes to see if this product is required for your area.
Installation Instructions
Specification Sheet

Weight	0.44 lb
Color	Silver Tones
Finish	Steel Optic
Finish Type	Brushed
Height	3.00 in.
Length	11.22 in.
Room	Kitchen
Type	Air Gaps
Width	4.13 in.
Inventory Number	HAN04214800
MPN	04214800