8" Plastic trench drain (PRO 200P), D ClassVodalands 8 Pro plastic trench drain has an 8 internal width (10 1 4 external), and a 3. 28ft (1 meter) length. This trench drain comes in 3 external depth options of 4. 53", 8. 47, and 12. 4". This trench drain comes with a D class ductile cast iron grate. The D load class is designed to withstand heavy duty traffic including tractor trailers, forklifts, machinery, etc. The plastic channels connect easily to one another to form the customers desired