Master Flow 10x3.25-to-4 Stack Boot
Updated September 23, 2026
This auction ended on October 9, 2026.
See upcoming auctions from Mystery Box Merchandise.
| Lot number | 56 |
| Auction | October Building Materials and Farm Equipment Auction |
| Date | October 9, 2026 at 7:00 PM EDT |
| Auction house | Mystery Box Merchandise |
| Location | Nunda, New York |
Master Flow galvanized steel stack boot, model SB10X3.25X4. Converts 10 x 3-1/4 inch rectangular duct to 4 inch round. Appears unused with minor storage wear. Sharp edges; handle carefully.
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