UK Exclusive…….. 2 distinct decks in 1 package! ( different decks ) -stainless steel 304 material -4 posts with 3mm slots each  – 2 positive 2 negative -peek insulator -variations of sleeves, brass ss and black -18mm wide bore cap -standard 510 adaptor -adjustable copper positive connection -2.5mm x 6mm adjustable airhole slot -7mm deep juicewell! -bottom airhole configuration -100 percent assurance no juice spill on the bottom airholes -certified for flavor and vapor