General specifications, may vary from company to company.
A Unit=Mini Van.. up to 500 lb cargo
B Unit=full size van, up to 3000 lb cargo
C Unit=Straight truck with 16 ft box, up to 5000 lb cargo
D Unit=Straight truck with 22-24 ft box, up to 13,000 lbs cargo
E Unit=Tractor trailor, anything above 13,000 lb cargo
Dreamer