Cart Parts › Top Support Image 1 of 2 Image 2 of 2 Top Support from $60.00 Color: Select Color Natural Woodtone (901) White with Black Core (902) White with White Core (903) Black (904) Gray (905) Brown Woodtone (906) Quantity: Add To Cart Added! (1) Top Extension Support.This part is compatible with all 900 series carts. (1) Top Extension Support.This part is compatible with all 900 series carts.