Size

12' x 5' (16000L), 12' x 7'6" (24000L), 12' x 10' (32000L), 15' x 7'6" (37500L), 15' x 10' (50000L), 18' x 7'6" (54000L), 18' x 10' (72000L), 21' x 7'6" (73500L), 21' x 10' (98000L)