Max Lite earplugs are ideal for long-term users and those with smaller ear canals. The low-pressure foam earplugs offer long-term user comfort not found in other pre-shaped foam earplugs. The non-irritating, non-allergenic self-adjusting foam recovers to fit virtually any ear canal. Refill for Leight® Source 500. NRR 30dB. Tested to ANSI S3.19-1974 standard. 500 pair per box. Sold by the Box.