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 $5.50 per filter and there is a minimum quanity of 10 filters per order.  For the 37mm filters in the plastic three-piece cassettes, we accept minimal orders of 5 and charge $10.00 each.  Filter orders can usually be sent out the day after the order is placed.  For ordering or information please contact us.