According to Rubbermaid’s description for the square swing lid for 3958/3959:
It has a drop-and-swing design — opens for waste disposal, then returns to hide refuse from view.
Helps control odors and reduce visible trash by concealing the waste when the lid closes.
Dimensions: ~ 20.13″ × 20.13″ footprint, ~6.25″ height.
Special order item - may cause delivery delays.
FREIGHT TBA- One of our Team members will contact you in regards to freight charges.