Tapered-end mask: 620ml volume; clear, hard plastic wall; soft, black rubber diaphragm; for large dogs with pointy nose e.g. Pointer, Hound, also pig snouts

Polycarbonate Mask: opening 110mm (4.3") ID, internal depth = 115mm; silicon diaphragm with 75mm (3") aperture; breathing circuit inlet 22mm F with connector 22mm M/15mm M & silicon head strap.