Outer diameter of banger is 25mm
The v5 seamless banger cost a little more, i would say it is slightly stronger and we had these made from a new glass supplier
we have these in 10mm & 14mm male 90° at the moment
these fit the v5 If you want the dabber carb cap by itself you can purchase it here
You will notice the quality of these bangers the second they arrive, smooth, clean and made with quality.