BUY 4 PIECES, GET 1 ADDITIONAL PIECE FREE, USE DISCOUNT CODE BUY4
BUY 8 PIECES, GET 2 ADDITIONAL PIECES FREE, USE DISCOUNT CODE BUY8
BUY 12 PIECES, GET 3 ADDITIONAL PIECES FREE, USE DISCOUNT CODE BUY12
BUY 16 PIECES, GET 4 ADDITIONAL PIECES FREE, USE DISCOUNT CODE BUY16
