Stanless Y Reducing connector.

1 x 3/4 x 3/4'' 1 x 1 x 3/4'' 1 1/4 x 1 x 1'' 1 1/4 x 1 1/4 x 3/4'' 1 1/4 x 1 1/4 x 1'' 1 1/2 x 1 x 1'' 1 1/2 x 1 1/4 x 1 1/4'' 1 1/2 x 1 1/2 x 3/4'' 1 1/2 x 1 1/2 x 1'' 1 1/2 x 1 1/2 x 1 1/4''