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 Pre-packed reactor for Sulfur $110.00 Add to cart 1 m Packed column for Oxygen (molecular sieve) $200.00 Add to cart Combustion Tube, Sulfur $60.00