This Delta RP50787AR is a support assembly. It includes a nut. This support assembly is used for kitchen sprays. It comes in an arctic stainless finish. This product is a genuine repair part from Delta. It is also available in chrome (RP50787), SpotShield stainless (RP50787SP), champagne bronze (RP50787CZ), Venetian bronze (RP50787RB), and stainless (RP50787SS). Delta is one of the leading innovators in the way you experience water each and everyday. They are committed to developing technologies that will bring the best in home innovation - making your busy life a little easier! PlumbersStock is a great online partner for buying plumbing supplies and more! It offers a wide selection of tools, lawn and garden equipment, and HVAC supplies. It can give you almost everything that you're looking for when it comes to plumbing parts. You can even find some of the hardest-to-find parts of the industry here at PlumbersStock at very fair prices.