1.5" Tri-Clamp Dewaxer Columns1. 5" Tri Clamp Tri Clover Dewaxing Columns This is a 1. 5" Tri Clamp Tri Clover 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: 1. 5" x 12" Tri clamp Dewaxer Column 1. 5" x 18" Tri clamp Dewaxer Column 1. 5" x 24" Tri clamp Dewaxer Column 1. 5" x 36" Tri clamp