Great way to watch birds right up close through your window without scaring them away. A feeder is necessary for birds in the cage to feed them food or water. With stand perch, suitable for birds standing, climbing,grinding claws. Can prevent food from wet.Easy and convenient to wash and clean. Suitable for small medium large wilds birds, parrots, parakeets,cockatiels,conures, finches,budgie,macaws Lovebirds,etc. Specification: Material:Acrylic Thickness: Approx.3mm/0.12inch S-Size: Approx.13x11x13cm/5.12x4.33x5.12inch M-Size: Approx.16x16x16cm/6.30x6.30x6.30inch L-Size: Approx.21x21x21cm/8.27x8.27x8.27inch Package Includes: 1 Piece Acrylic Window Bird Feeder Note: The color may have different as the difference display, pls understand. Please allow 1-3mm error due to hand test.