66-0822 - Heister's mouth gag 66-0823 - Doyen-Collin mouth gag 66-0824 - Doyen-Jansen mouth gag 66-0825 - Fergusson's mouth gag adult 66-0826 - Fergusson's mouth gag child 66-0827 - Fergusson-Ackland mouth gag with sliding ring 66-0828 - Mason-Ackland mouth gag child 5½" (14cm)