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 Inserts, Quartz (Disposable) For Na 1500 Series I Combustion Tubes $45.00 Add to cart Transparent Quartz tube $69.00 Add to cart 2 m Packed column for Oxygen (molecular sieve) $220.00