Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not the filter canister advertised.

The filter advertised is a Shalon Chemical Type M-80 gas mask filter with 40mm Standard NATO thread. The filter canister I received is a Russian made filter canister, labeled in Cyrillic "GP-6." It also appears to have been made in 1978; far beyond it's expiration date. It does however, fit NATO canister thread specifications, so it will fit Israeli M-15 and Civilian gas masks. However, it's protective capabilities should be brought into question.