Upgraded from its predecessor, the Rig II boasts a new poker tool, stem cap, and glass collar . Designed to hold the included titanium nail, the 10mm borosilicate glass collar acts a heat barrier, protecting the silicone and extending its life. Equipped with ribs and chamber walls that have been reinforced by an extra 1mm, the Rig II has enhanced stability . In addition to a built-in concentrate container and four tool slots, it features improved durability and strength. 10 mm Glass Collar Upgraded Poker Tool & Stem Cap Reinforced Chamber Walls Built-In Concentrate Container Titanium Nail Included LIFETIME WARRANTY