DPW TPM MSU4-6 Upgrade Sleeve for Top-of-Pole (4" Mount to 6" Pole) Please log in to see price or purchase this item SKU: 220-0429 Details DPW, TPM, Upgrade sleeve for Top-of-Pole, 4" mounting pole to 6" pole, TPM MSU4-6Install Power-Fab Top-of-Pole mounts on a larger diameter pole with t... DetailsBackDetailsDPW, TPM, Upgrade sleeve for Top-of-Pole, 4" mounting pole to 6" pole, TPM MSU4-6Install Power-Fab Top-of-Pole mounts on a larger diameter pole with the upgrade sleeve.