This is an aluminum carrying case that is designed for AmScope B100, M200, M500, D100 and/or D120 series microscopes. It is a right case for the microscopes with the Model #, B100, B100A, B100B, B100-MS, M200, M200A, M200B, 200-MS, M500, M500A, M500B, M500-MS, D100, D100A, D100B, D100-MS, D120, D120A, D120B, D120-MS, and etc. Features & Specifications : Material: Aluminum Size: Medium Dimensions: 16.5" x 11.5" x 7.5.