*1/2" Galvanized pipe used in plumbing has an OD of 7/8"

Bathtub Spout Rear Seal

Red Disc and O-ring for 1/2" Brass or Galvanized pipe

Red Disc with its O-ring covers wall opening behind the bathtub spout

It slips over bathtub spout's 1/2" Brass or Galvanized pipe. Pipe O.D. = 0.875", 7/8".

Disc dimensions are: OD = 59 mm (2.32"), ID = 22 mm (0.88"), Thickness = 5 mm (0.20")-Thickness of 3-quarters stacked