B&W Trailer Hitches Reducer Sleeve, 3" To 2-1/2" Model RHXA2183B&W Trailer Hitches Reducer Sleeve, 3" To 2 1 2" Model RHXA2183 Adapter reduces a 3" x 3" hitch receiver opening to 2. 5" x 2. 5". It can be nested with the RHXA2182 to provide a 3" x 3" to 2" x 2" reduction in hitch size. Adapter reduces a 3" x 3" hitch receiver opening to 2. 5" x 2. 5" Slides directly into your hitch or onto the shank of your accessory Adapter stops when flush and holes are aligned Slotted holes ensure fit Cutout notch allows