DF1B-16DS-25RC DF1B-16P-2.5DS DF1B-16P-2.5DS(01) DF1B-16P-2.5DSA DF1B-16P-2.5DSA(01) DF1B-16S-2.5R DF1B-18DEP-2.5RC DF1B-18DES-2.5RC DF1B-18DES-25RC DF1B-18DP-2.5DS