You will need to provide the length and screw clearance measurements (or just the length if attaching with silicone) as outlined under "Ordering Instructions" in the "Brass Barrel Weights" tab of the website.
You can include the measurements in the "notes" section of the payment, a separate email, or call me with them.
I DO NOT keep a log of barrel measurements, as every barrel is different. I will need the measurements off if your specific barrel to be able to make your weights.
If you cannot provide the measurements as outlined, please do not place an order, as I will not be able to fulfill it.