[Used] This is a listing for a large mouse/rat experimental breeding cage. Size: Approximately 30cm wide, 46.5cm deep, and 16cm high. Materials: Body: Polypropylene, Lid: Stainless steel Bottle Capacity: Approximately 600ml This is a used item, so there may be dirt, scratches, discoloration, scratches made by mice with their claws, and areas chewed by teeth, but please understand. There are no problems with normal use, and we have not confirmed any cracks, holes, or leaks. The rubber part of the bottle lid is dirty as you can see, and although I cleaned it with a brush every time I changed the water, it has not come off due to aging. Since this is equipment used by animals, I have not cleaned it with chemical detergents. Also, the rubber part has become quite thin, so please understand that the bottle is only an extra. If we pack it in a cardboard box, the size will become large, and the shipping cost will be high, so we will ship it wrapped in bubble wrap. The photos are representative. Please note that the actual product shipped may differ. This product is equipped with a locking mechanism on the lid, so adult rats can be kept in it as is. As you can see in the photos, there are two types of lids. There is a type with stainless steel plates on both ends of the food placement area, and a type without them. There is no effect on breeding even with the type without plates. I am very sorry, but you cannot choose the type of lid. I would like to ship the one with the plates for the first shipments. Thank you for your understanding. We may have more stock than the number of items listed, so please contact us if you want more than the number of items listed. This is a used item, so please understand the above.