Based on this product's specifications, here are some alternatives and similar models
Protective case for AirPods Max by Spigen — model ASD02832, Black, 33 g
Summary description:
Hard protective case designed for Apple AirPods Max by Spigen (model ASD02832). Finished in black and weighing 33 g, the case provides a compact cover for storage and transport, protecting the headphones from scratches and minor impacts. Suitable for daily commuting, travel and organized storage of AirPods Max.