Pink and Orange Butterfly Collection Musical Crib Mobile sets will help complete the look of your nursery. This set includes musical mobile frame, canopy with hanging toys, and matching arm sleeve cover. The wind-up mobile spins and plays Brahms's lullaby. This mobile fits standard cribs. Your Musical Mobile Set Includes: Plastic mobile frame with music box Plastic clamp fits standard rails up to 2 3/4 in. wide* Fabric Canopy with hanging toys Arm Sleeve Cover *Note: The plastic clamp fits standard rails up to 2 3/4 in. wide. Non-standard crib rails may be wider than 2 3/4 in. and may not work with these mobile frames.