Comparison : Item # 50010 2.3mm CP, 2.3 Millimeter (mm) Material Thickness (A) Training Collar
Item # 50010 3.2mm CP, 3.2 Millimeter (mm) Material Thickness (A) Training Collar
Item # 50010 3.8mm CP, 3.8 Millimeter (mm) Material Thickness (A) Training Collar
Item # 50010 3.0mm CP, 3.0 Millimeter (mm) Material Thickness and (A) Training Collar