Animal Surgical Immobilizer, L210xI. D.55mm, model 9135 is manufactured by RWD Life Science Co.,LTD The surgical fixator can be used for multiple and repeated measurements of non-invasive blood pressure in awake animals, tail blood collection, tail vein injection and administration, subcutaneous or intradermal injection at the base of the tail, tail tenderness, tail perm pain or electric sting experiments, and animal behavior observation.