The Rook Post Mount Adapter is a 100% PVC sleeve designed to fill the void between standard sized 1-5/8" or 2" O.D. round pipe and a 4' or 5' vinyl post. The Rook acts as a spacer from the outside wall of the pipe to the wall thicknesses of 4" and 5" vinyl posts. They slide over the round pipe and are fastened with screws. Just slide the vinyl post over The Rook Post Mount Adapters and you have a professionally installed vinyl post. Benefits: 1. Allows for vinyl post installation in troubled areas. 2. Offers the option of retrofitting chain-link fences to vinyl. 3. Adds flexibility with various wall thicknesses of vinyl posts. 4. Provided the option of no digging and no mess vinyl post installation. Available in White only. SKU:   1290B Weight:   39 Quantity:   48 Colors:   n/a