The non-slip surface also helps calm the animal and is easier on the animal's footpads. The anatomically correct, curved back butt plate minimizes the risk of back injury. Adjustable vertical head bars can be removed when not needed. A rear access hole allows for pyrogen testing (except 1121D24). Stainless steel pin offers several fine adjustment points for neck plate. Unit can be sanitized in a cage washer up to 180°F or sterilized chemically. Non-slip base pads ensure unit stability.