The MPP-B "Wierzba" is a fibreglass Polish minimum metal anti-tank blast mine.
The mine is similar to the Russian TM-62 series and is compatible with the same fuses.
It is normally used with a MWCz-62 fuse with a clockwork arming delay, which is a copy of the Russian MVCh-62.
It can also be used with a ZMN electronic combined pressure and magnetic influence fuse.
The mine is currently in service with the Polish armed forces.