Imitation Wood Design: Spacers on both sides-protect the bed rail prevents skidding. Makes this crib mobile arm suitable for more baby mobile, such as wooden crib mobile, natural and simple..Size Details: The baby mobile hanger is 18 inches tall; Fits width of crib rail: 0.7 ~ 1.7 inches; this mobile hanger is compatible with a crib or bassinet size of rungs 1.7 inches (MAX). If the crib rungs exceeds 1.7 inches, it is not suitable..Convenient Storage: Foldable, one-click operation. Easy to carry on the go. Easy to store when not needed. Greatly saves the occupied space and has simple structure..Easy to Use: Very easy to assemble and adjust. The crib mobile holder with a clamp-on design, make it easy to attach a mobile to the crib without drilling holes..Service Guarantee: If you have any questions you can contact us at any time, we will do our best to solve for you.