The Gas Mask Filter Adaptor 40mm & 60mm is a brand new, genuine military surplus item, which allows you to switch between a 60mm and a 40mm filter. This gas canister adaptor is a NATO issue filter adaptor. This genuine NATO gas mask filter is designed to allow filters with a 40mm thread to fit a 60mm opening, allowing you to use new filters in older model gas masks!

Specification:

• This Gas Mask Filter Adaptor allows you to switch between 60mm & 40mm filters
• The larger thread is 60mm and the inner thread 40mm
• Offered brand new, this is a genuine military surplus item
• This has mask filter / canister adaptor enables filters with a 40mm thread to fit a 60mm opening
• This useful device allows you to use new filters in older model gas masks