Rainbow/Jailhouse with Black/White Stringers Boro Vac Stack Line Tubing — 1st Quality is a vac-stack, lined borosilicate color glass tubing for lampworking, flameworking, studio prep, and production glasswork.

This tubing is made for artists who want color volume, not just tiny accents. Use it for bold sections, tube prep, sleeves, and production work where the glass itself needs to carry the design. The key character here is vac stack, lined, giving the listing a more specific working personality. Listed grade/status: 1st Quality.

Working Notes

• Product type: borosilicate color glass tubing.
• Best for: sections, sleeves, tube pulls, lined tubing work, prep builds, and production glasswork.
• Color/effect profile: vac stack, lined.
• Grade/status: 1st Quality.
• Artist note: Photos and finished color can vary by backing color, flame chemistry, thickness, lighting, and kiln cycle.

Original shop notes: Rainbow/Jailhouse with Black/White Stringers Boro Vac Stack Line Tubing Simax inner and outer layer - North Star 1st Quality Rod - The Best of the Best materials Price per ounce is $6.88 for Boro Vac Stack Tubing — Kiln Annealed