Computer/Training Tables (Melamine) - Adjustable 24"x48" Black Granite colored Melamine top. YOU CAN COUNT ON CORRELL: Correll was established in 1969 and has been in business for over 50 years. Table easily adjusts from 21" to 29" high in 1" increments. Melamine top has a harder and smoother writing surface than real wood furniture, and has about the same water and scratch resistance.