![Innocage Mouse, bottom only Innocage Mouse, bottom only](https://cdn11.bigcommerce.com/s-ye27j2homb/images/stencil/500x659/products/12486/4313171/m-btm__09209.1725026900.jpg?c=1)
Economy Flat Bottomed Restrainers. Individual semi cylindrical plastic restrainers in small, medium and large. Each unit has an open slot on the bottom (for intra-peritoneal injections), a hole on the top (for the neck), and a slotted tail piece (for intravenous injections). Front slots provide ample ventilation.