Zoom icon Click to expand Tap to zoom Chevron down icon Chevron down icon Simulated Mercury Tube 8 x 42 mm by PERRIN Sale $11.00 | / SKU 76-426 1 2 3 4 5 6 7 8 9 10+ Quantity Chevron down icon Quantity Add to cart Spinner icon Notify me when back in stock Email address Email me when available Simulated Mercury Tube 8 x 42 mm is a replacement glass tube measuring 8 mm (outer dimension) by aprox. 42 mm in length.