Wooden bird bases feature a metal hook for hanging them in the cage and a lid that can be opened for easy cleaning. They have a special entry hole for easy access. The diameter of the entrance hole in the nest ranges from 4 to 8 centimeters.

• Dimensions 11.5 x 12.5 x 12 cm
• Dimensions 13 x 12 x 17 cm
• Dimensions 19.5 x 14 x 14 cm
• Dimensions 25 x 17 x 17 cm
• Dimensions 26 x 25 x 33 cm