Tapered-end mask: 190ml volume; clear, hard plastic wall; soft, black rubber diaphragm; for small to medium dogs with pointy nose e.g. Terriers & birds with protruding beaks

Polycarbonate Mask: opening 70mm (2.8") ID, internal depth = 70mm; silicon diaphragm with 37mm (1.5") aperture; breathing circuit inlet 22mm F with connector 22mm M/15mm M & silicon head strap.