3" Tri-Clamp Dewaxer Columns3" Tri Clamp Tri Clover Dewaxing Columns This is a 3" Tri Clamp BVV Tri Clamp Dewaxing Spool. It is intended to have dry ice put into the sleeve to chill the material inside the column. **Note: When selecting a Pipe Hanger choose the size that correlates to the Sleeve OD NOT Spool OD Sizes Available: 3" x 6" Tri Clamp Dewaxer Column 3" x 8" Tri Clamp Dewaxer Column 3" x 12" Tri Clamp Dewaxer Column 3" x 18" Tri Clamp Dewaxer Column 3" x 24" Tri Clamp