Produced according to ISO 13485 and CE standards. SR-023 is for Infant. Swivel joint (360°) between patient and face mask allows unrestricted movement, easy to disassemble. SR-021 is for Adult, SR-022 is for Child. Detail Infant type rubber resuscitator × 1 # 0 silicone mask × 1 Oxygen reservoir bag (1,700ml, PE) × 1 Oxygen tubing (200cm) × 1 Air way: 40, 50, 60mm × 1 pc each Paper box × 1