Transparent quartz tubes 25mm OD x 450 mm length; 1.5mm wall thickness combustion and reduction. For CM-5000 combustion module.$65.00 Transparent quartz tubes 25mm OD x 450 mm length; 1.5mm wall thickness combustion and reduction. For CM-5000 combustion module. quantity Add to cart Category: Combustion and reduction tubes Related products Add to cart 2 m Packed column for N2, CO2, H20, SO2 $300.00 Add to cart Combustion Tube, Large 25 mm Od $65.00 Add to cart 0.8 m Packed column for SO2 $150.00