BST10-d suction tower collator system allows set transport to 2 different outputs with 3 different 10-bin towers: main tower BST10-d right or BST10-d left and additional add towers. System expandable to 5 towers. BST-d+ vertical suction tower collator system. Touch-sensitive keyboard. Includes all features and functions of BST-d. Can be expanded from single tower with 10 bins up to 5 towers, or 50 bins. Sheet sizes from 41⁄2×8" to 133⁄4×201⁄2".