Jones Stephens has built its reputation over the years as a leader in the plumbing industry, providing the market with thousands of products to complete any project. This Closet Flange Extension Kit requires no mastic between pieces as with stackable units. The kit contains one 1/2 in. flange and two 3-1/2 in. closet bolts with washers and nuts. This extension flange is made from durable plastic construction.