<p>Pack of 3 filters with air filter remover for Pari Proneb Ultra -- <strong>(not for Proneb Ultra II and not for the Pari ProNeb MAX)</strong>. These white air filters are the same as the PARI Long-lasting air filters for ALL PARI nebulizer systems, however, this pack includes the special filter removing tool needed to replace the filter for a PARI ProNeb Ultra and original PARI Trek. Replace filter every 6 months or every 500 hours of use. Each pack comes with 3 filters.</p>