Copper-Tin Alloy Prong Dog Training Collar, Assembly-Chain Design in 2.25 mm, 3.2 mm and 4 mm Gauges

This copper-tin alloy prong dog training collar uses a classic center plate, assembly chain and two-ring connection for controlled lead work. Herm. Sprenger offers three verified gauges and lengths for dogs within the stated weight limits.

The source describes the alloy as a choice for dogs sensitive to conventional metal finishes but does not guarantee compatibility for every dog. Correct fitting and guidance from a qualified trainer are important.

Key Features

• Copper-tin alloy construction provides a distinctive metal option.
• Classic center plate distributes the linked collar sections.
• Assembly chain and two rings create the limited-pull training format.
• Three source sizes cover different neck lengths and weight limits.

Specifications

• Brand: Herm. Sprenger
• Product type: prong dog training collar
• Material: copper-tin alloy
• Small option: 2.25 mm gauge, up to 40 lb, 13 in length
• Medium option: 3.2 mm gauge, up to 88 lb, 19 in length
• Large option: 4 mm gauge, up to 154 lb, 21 in length
• Use: supervised lead training only

Measure before choosing a size and seek professional guidance for fitting and use. The source recommends introducing this training collar only when age and breed development are appropriate.