Coffee Filters. These commercial / institutional size B50 Coffee Filters are a must in every break room, office, restaurant or school. Check your inventory and stock up today! Fits Bunn and most other 10 to 12 cup basket style commercial coffee makers. Coffee Filters are bundled into 50 count bunches for easy storage. Each package contains 10 bundles of filters ( 50 filters each for a total of 500). The base of the coffee filter is 4.5 in. Oxygen Cleaned White paper coffee filters. Great in the office to be used as a popcorn bowl for our Act II Microwave Popcorn. 500 per Bag / Case of 1,000