With 510 threading connection, can also be worked as a cigarette stand & Heat Sink tool. Great for fidgety hands, ADD & ADHD sufferers killing time, helps relieve stress & quit smoking. Easy to carry, small, simple, discrete & fun, also effective for focus & deep thought. Stainless steel & brass construction 2-in-1 designed With E-cigarette Stand & Heat Sink Function Thread Type: 510 thread Color 7 Color Compatible 510 Threading Tank Atomizer Size 26 x 8mm Net Weight 19g Package Weight 50g