The slip joint poly washer has a tapered end and a flat end. When using PVC for plumbing connections, you are going to run across slip joints. A slip joint allows a raw end of pipe to slide into the threaded end of a fitting. The ends are connected and sealed with a combination of a slip nut and a slip washer.
Bath drain with stopper and chain is heavy duty 22 gauge brass. This bath drain has a polished chrome trim and is for tubs with legs and exposed drains.
Triplever bath drain 20 gauge rough brass. All metal construction. Chrome plated exposed trim. Slip joint connections allow adjustment from 10-1/2 in. to 13-1/2 in. high.