Our quartz filters are pre-fired  and then packaged in Petri dishes or cassettes, and are ready for sample collection. We offer 25mm, 37mm, or 47mm filters in Petri dishes. We also offer 37mm filters in three-piece plastic cassette samplers.

For any size of filter in the petri dishes, the cost is $4.00 per filter and minimum orders of 10 filters are preferable. For the 37mm filters in the plastic three-piece cassettes, we accept minimal orders of 5 and charge $7.00 each. Quantity discounts are available for very large orders, please contact us. Filters are usually mailed out the day after an order is placed if it is after 11pm Pacific Standard Time or if it is a large order. For ordering or information please contact us.