Civil trucks and tractors plastic model kits can be conditionally divided into two categories: military and civilian. Accordingly, military trucks and tractors are produced together with military equipment in 72, 48 and 35 scales, and civilian trucks together with models of cars and railway transport equipment at 18, 24 and 87 scales. Very often scale models of trucks and tractors are produced as tractors for artillery, while heavy guns of large caliber can be towed only by tractors on caterpillar tracks.