Standard soviet military charcoal gas mask filter. Suitable for many russian gas masks. This filtercanister is designed for GP-5 gas mask, but fits with almost all soviet russian gas masks like GP-4, GP-5, PMK, PMG, PDF, PDF-7, PDF-D, PDF-2SH, GP-4U and others. Thread diameter - 40 mm. Filters has no expiration, so its 100% safely. Each filter comes originaly wraped in paper with all factory seals Shipping to Australia : Economy shipping - 6$. Shipping time : from to 2 weeks up to 60 working days.Standart shipping with tracking information - 9$. Shipping time : from 2 weeks up to 45 working days. Shipping to United states, Canada, Europe, Asia, : Economy shipping to: United states, Canada, Mexico, Europe, Asia - 6$. Shipping time : 7-31 working days or sometime more. Standart shipping with tracking information to: United states, Canada, Mexico, Europe, Asia - 9$. Shipping time 7-21 working days or sometime more.