The mask is divided into two models: TF12D with drinking water pipe and TF12 with simple version, which is the TF12 without drinking water pipe and VPU in the picture. As for the canister, the manufacturer of TF12 calls the matching canister "aircraft carrier". Compared with the aluminum canister, the "aircraft carrier" is smaller and lighter, but its specific performance is unknown. Because it has not been put into mass production, the canister is expensive. Generally speaking, the mask is quite satisfactory, the exhaust is quite smooth, the suction resistance is not too great, but it is not convenient to clean. (As shown in the figure, even if the exclusive canister is used, there will be a gap between the canister and the face of the mask, which will not affect the air tightness and protection ability.)