When we think crossing we think versatility, sleek design and high quality. With the 510 extension those thoughts seem to once again be in the correct place. Take one end of the 510 Extension and fit it to your favorite Box Mod or 510 threaded rig, the take the other end to any 510 thread atomizer. And just like that, you have portable E-Rig at your fingertips. We extend our invitation to take your sessions to the next level.