Middle three-turrets T-28 (weight 25,2-32 tons) was manufactured in 1933-40.

Engine:M-17 with power 500 Hp. Max speed: 40km/h. Range:170km.

Armament: 76-mm PS-2 gun ,4* 7,62-mm  mashine gun.

Armor: 30 mm at the front,20 mm other sides,

after "winter war" 39-40 armor  was growed to 50-80 mm.