COPPER for reliable longevity, TITE for a secure watertight fit.  The Copper-Tite is retro-fit drain made up of a copper body, ABS clamping ring (standard), polyethylene strainer (standard) and expanding tape to prevent water back-up issues.  Available is sizes of 2", 3", 4", 5", 6", 8" and 10" (available in non-standard sizes).  Custom fabrication available.