Made of SS 304. This is one of the stainless steel kinds of highest quality and ensures that the product will never rust. On the backside of the bowl you will find a with nylon strengthen holder you can mount with 2 screws on a wooden wall. This is a beautiful and durable product you can enjoy for a long time. If you are looking for accessories for this product, please take a look at SSNM. This holder allows you to slide the feeder/drinker into it, until it is snapped. You can release the feeder/drinker by pushing on the spring and lifting the bowl a little up. SSNM can be mounted on wire mesh (2 parts) or screwed on a wooden wall (1 part). A set of bolts and nuts of SS for wire mesh mounting are provided with SSNM. Also available in the following sizes: 1. 400 ml 2. 600 ml 3. 850 ml Assembling system is separately available.