The Profit Umbrella Diffuser, a simple yet clever accessory that is pulled over the front of a white or silver umbrella to turn it into a huge soft box, thereby creating a softer and more diffused light. Compatible with the Umbrella Deep White XL and the Umbrella Deep Silver XL. Reduces the output by 1. 5 stops. Features: For Extra Large Deep Umbrellas Reduces Output by 1. 5 Stops