Flexible, phthalate-free PVC fittings connect Cast Iron, Schedule 40 Plastic, Steel or Copper pipe. To repair or replace drain waste and vent (DWV) fittings. No gluing, threading or soldering needed. Non-pressure, gravity flow applications only. Recommended for above ground installations. Easy to install and reuse. Multiple sizes from 1 12" to 4. COMPONENTSClamps: 300 Series Stainless Steel, Worm Drive (2)Bushings: Molded, one-piece, elastomeric reducer bushingGasket: Molded, one-piece, phthalate-free PVC sealing gasket