The co-axial modification of the basic “T”-piece system is a compact, lightweight, and cost-effective anesthesia delivery system designed to enhance clinical utility. Based on the Mapleson “D” system, it features a corrugated tube, expiratory valve, and antistatic bag, allowing patients to inspire fresh gas from the outer reservoir tube and expire into the same. Its single-tube convenience ensures low resistance to breathing, minimal dead space, and ease of handling. Conveniently sterile and individually packed, it provides an efficient solution for safe anesthesia delivery while facilitating effective scavenging of waste gases.