Set-Rite Toilet Flange Extender Kit Adjustable from 1/4 " - 1 5/8" - 2 Pack *Only CODE Approved Extender Kit with Watertight/Gas Tight Gasket that Spacer Thickness Inches: 1/8, 1/4, 1/2, 3/4 & Extender Construction: Polpropolene Extender Size Range: 1/4 -- 1-5/8 Gasket Included: Yes