【 citydog / citydog 】 Simple Modern Cage Dedicated Water Holder Attachment. This is a holder for easily attaching a water dispenser to a pet circle. - Product Name: Water Dispenser Holder - Color: White - Application: For pet circles - Instruction Manual: With QR code - Shape: Circular I purchased this by mistake because I didn't need it for the citydog small dog cage I bought. I realized my mistake when I tried to attach it, so it has been opened.