This is the Case Set for the Hitec HS-50 Sub Micro Servo (HRCM0985). FEATURES: Black plastic construction INCLUDES: Top, center, and bottom case sections for the Hitec HS-50 servo REQUIRES: Transferring all components from old case to new one SPECS: Length: 0.82"" (21mm) Width: 0.47"" (12mm) Height: 0.90"" (23mm)