Da-Lite Adjustable Overhead Cart with 16" x 20.5" Projector Well, 5" Casters and Electrical Assembly Multi-Purpose Projection Carts and Stands. AVOH models adjust in cart height and well depth to accommodate various projectors. AVOH models are ideal for overhead projectors featuring added work shelves for reference or presentation materials. Work shelves on the AVOH-2939J fold down for easy storage. AVOH models are partially assembled for convenience and arc welded for added strength. Free standard shipping to destinations within the 48 contiguous states.