In another word, Freemax Maxus Max Pro 168W Kit has a 510 base, but Maxus Max 168W is without a 510 base. If you want to connect the other vape tanks, you need to put a 510 adapter on Maxus Max 168W Mod.
Freemax Maxus Max Pro 168W consists of Maxus DTL Pod Tank and Maxus Max Pro 168W Mod. And Maxus DTL Pod Tank is creatively designed with Maxus DTL Pod and a 510 connector. However, Freemax Maxus Max 168W Kit comes with Maxus DTL Pod and Maxus Max 168W Mod.

For more information about Maxus Max Pro 168W Kit, please click here>> https://www.freemaxvape.com/maxus-max-pro-168w-kit
For more details about Maxus Max 168W Kit, please enter here>> https://www.freemaxvape.com/maxus-max-168w-kit