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, Alumina For The Turbo N 4040 Combustion Tubes $25.00 Out of Stock Read more Transparent Quartz tube $69.00 Out of Stock Read more Pre-Packed Reactor For N, C/N Or Chn Analysis $155.00