Our Parabolic softbox with Bowens amount, 96 mm / 3.78'' caliber, is compatible with universal standard photo lights. 3 layers of diffusers can be freely combined into 4 lighting effects. You can quickly install and it weighs only 3.97 lbs / 1.8 kg. 33 in / 880 mm softbox to spread a wider area. | Vevor | | Parabolic Softbox, 33 in / 850 mm, Quick Release and Quick Fold, Lightweight and Portable, Universal Bowens Mount | Black | Best Buy