Jennings Mouth Gag 485-510 infant 3 1/2" spread 485-512 small 4 1/4" spread 485-514 medium 5" spread 485-516 large 6" spread 485-510 485-512 485-514 485-516 478 Colorado, USA / 1.800.821.7496 / www.SontecInstruments.com