Manufactured from high quality stainless steel that will withstand sun, chlorine and cold. The stainless steel tubing is super strong and provides secure entry and exit from the pool. Made specifically for in-ground vinyl pool.n———-nSwimline Corp. is a family owned and operated business. Founded in 1971 Swimline has grown to be the largest manufacturer of above-ground swimming pool liners in the world. In addition Swimline Corp. is the largest importer of in-ground and above-ground swimming pool covers and related accessories. Escutcheons not included!