The base neck size for each wire gauge is as follows:

2.25mm -> fits up to a 13" neck measurement; designed for use in dogs up to 40lbs

• This ULTRA-PLUS Training prong collar is our classic version, perfect for professional dog training.
• The CUROGAN finish means this dog collar is nickel-free and rust proof. It is a great choice for dog’s that typically experience discoloration or reactions from other collar materials.

If your dog exceeds the starting length capacity of your suggested wire gauge size, you will need to purchase additional middle links

We do not condone the improper use of our training prong collars. Please note; we do not advise the use of a training prong collar on dogs under the age of 7-9 months old (breed dependent). If you are new to utilizing a training prong collar, please seek the advice of an authorized trainer.

Specifications: Curogan; 2 Rings