Made in solid and thick black aluminium ensure a fast thermal transfer of the holder temperature to the mouse body, maintaining it for a considerable amount of time.

This achieve the following goals:

• Animals are prone to enter the restrainer spontaneously where they found an obscure and hot shelter, so no more difficulties in pushing animal in, specially if you warm-up the holder and place it on a illuminated table.
• Animal body can be en warmed by the holder temperature to dilate the tail vessel, making injection and blood sample much more easy.

Just immerse the restrainer in 30°C hot water before let the mouse in; the aluminium will fast warm up and will maintain the temperature for long. Furthermore, thanks to its design, the Romanovsky-holder allows the tail to be fully visible, including the last part of the hairy skin on the tail.

The black coloured restrainer, closed and warm, represent an ideal shelter for the animal.

The adjustable conical front muzzle makes easy to adapt the restrainer to the mouse size and the bottom closing door can be placed using just one hand, while not having screws or knobs.