HD&E Endeavor Brass specs:

• 30mm 464 Naval Brass with the new 25mm “half thread” (improved top hat)
• 110 copper star pin
• 18650 & 20700 compatible
• Vents holes top and bottom
• Locking button
• 2 Rare earth magnets

Please note this is a mechanical mod, A great understanding of ohms law and battery safety is needed, if you do not have a great understanding of either of those please do not purchase this product.