This microscope carrying bag comes with medium size that fits most of industry standard full size microscopes including B370, B390, B400, B490, T370, T390, T400 and T490 series microscopes. It is also good for M200, M500, D100, D120 series microscopes. Features & Specifications: Heavy duty inner elastic straps support Dual side up-down zipper Light weight Fits many models of microscopes with standard medum size Material: Vinyl Size: Medium Dimension: 10-1/2" x 7-0" x 15-1/4" (270mm x 180mm x 390mm) Net Weight: 1.5 lbs (0.7 kg) Shipping Weight: 6.5 lbs (3 kg)