Tapered-end mask: 75ml volume; clear, hard plastic wall; soft, black rubber diaphragm; for exotics & small dogs with pointy nose e.g. Maltese, Pomeranian, Poodle & exotics

Polycarbonate Mask: opening 50mm (2") ID, internal depth = 45mm; silicon diaphragm with 40mm (1.6") aperture; breathing circuit inlet 22mm F with connector 22mm M/15mm M & silicon head strap.