Add to Wishlist Merrick M998043 16" x 16" Super Duty Dolly | 1 Dolly Merrick M998043 Super Duty Dolly The Super Duty Dolly is a specially reinforced version of the Merrick 16" Dolly that also features six high capacity casters. Originally designed for a customer who need to move an over-sized load, the Super Duty Dolly is... MSRP: $355.00