Home » headsets » Semi Integrated Headsets » dm-s_dm-s3 SEMI-INTEGRATED HEADSETS DM-S/DM-S3 ZS55/38.1 I ZS55/40(DM-S) ZS56/38.1 I ZS56/40(DM-S3) Alloy Cap & Steel Cups Ball Retainers ModelTop NutCup O.D.Crown ConeHeight DM-S1.5"5539.813.1 DM-S31.5"5639.813.1 Technical Diagram