HK Collection

Every tube sold with 2 random colored LED bulbs. Due to popular request, certain tubes are now sold TUBE ONLY. The housing assembly will be sold separate so you can choose the exact look/style you want for your setup. Prices for TUBE ONLY listings reflect this change. HK Mini | 18350 Manufacturer Recommendations Batteries: We recommend the Black+Yellow Aspire 18350 15 AMP 1300 MAH batteries. Available through our site HERE  HK DoubleDouble | 18650 Bringing the notorious HK style to our stackable tubes!Stack these tubes on the bottom of your Comp Lyfe tube to use in series configuration! A DoubleDouble Contact will be included with the tube to be used in-between your batteries during use. Screw your housing on last to complete your stacked set up! When using a Double Double with a DDiesel, you will need to put the Double Double Contact on the top of your battery (under the 510). Lastly screw your housing on the tube to complete your DoubleDouble set up! HK | 18650 Comp Lyfe's deb