The original Cunningham Mouse and Neonatal Rat Adaptor fits Stoelting Lab Standard and most other brands of stereotaxics. It employs light, tapered Delrin ear bars, to facilitate surgery on mice and rat pups. The Cunningham Mouse and Neonatal Rat Adaptor features an increased overall length to accommodate larger animals, and new specialized jaw holder cuffs, providing an alternative non-invasive means of securing the animal's head in the stereotaxic stage. Fully compatible with masks for gas anesthesia.