Certified and fully compliant with Australian/New Zealand Standard regarding respiratory protective devices AS/NZS 1716:2012.ABEK1 Multi-Gas Filter offers protection against organic and inorganic gases and vapours, sulphur dioxide and other acid gases, ammonia and organic ammonia derivatives. Use where multiple gases and vapours exist. Twist-lock connection to the STS mask is quick and easy to secure. Two required per mask. Compatible masks: RS01, RS01S, RX01, CF01, FS01. Dimensions: 82mm (dia) x 34mm (H). Weight: 100g.