Material : 2 in 1 Plastic Bowl & Stainless Steel Bowl, one is the plastic bowl, another is an internal stainless steel bowl, Made from food safe stainless steel and Eco friendly thickened plastic, safe and healthy to use for your pets. Easy to Install : Remove the white plastic lock by rotating counterclockwise, put the plastic dog bowl on the crate. Install the plastic dog bowl in the correct position, rotate clockwise the white plastic lock and tighten it. Easy to Clean : Removable hanging stainless steel dog bowl is removable for easy clean up, fill up or remove. No longer worry about the cage and bowl getting dirty. Just take out of the stainless steel bowl, and clean it by running water, then put the cleaned dog bowl back to cage.