Herm Sprenger Ultra-Plus Prong Training Collar, Chrome, 3.8 mm, Adjustable Fit

Herm Sprenger Ultra-Plus is a chrome-plated steel prong training collar for supervised dog training, with a 3.8 mm size designation and a 25 in (63 cm) overall length.

• Martingale-style Ultra-Plus design with a center plate — positions the links to apply even pressure around the dog’s neck.
• Swivel leash connection — lets the leash connect to a rotating attachment point.
• Interlocking links with two blunt prongs each — up to four links can be added or removed to change collar length.
• Blunt, slightly beveled prongs — the collar’s ends are designed not to scratch the dog’s skin.
• Made in Germany with HS-Germany INOX stamps on rings and plates — identifies the collar’s German manufacture and marked components.

This collar is made for dog training where a prong-style, martingale construction is appropriate and the collar can be used properly under supervision. Its center plate, interlocking links and leash swivel are built into the collar, giving handlers a defined arrangement for connection and fit adjustment.

How does the Ultra-Plus collar distribute pressure?

The center plate positions the links so pressure is applied evenly around the dog’s neck. The Ultra-Plus is a martingale-style training collar, with an assembly chain and a swivel for attaching a leash. Each interlocking link has two blunt prongs, and the prong ends are slightly beveled.

The blunt ends are designed not to scratch the dog’s skin. This is a training tool for use only with proper handling and supervision; the construction does not replace attentive use.

• The center plate holds the links in a layout intended for even pressure.
• The assembly chain forms part of the martingale-style design.
• The swivel provides the leash connection point.

What neck size does this collar fit?

The fit specification gives a maximum neck size of 21 in (53.34 cm), with an overall collar length of 25 in (63 cm). The size designation is 3.8 mm x 22–24 in (55.9–61 cm), while the technical specifications give a 4.0 mm wire gauge. These size and gauge figures do not align, so compare the stated maximum neck size with your dog’s measurement when assessing fit.

The listed neck-size limit and overall length refer to different measurements: one is the stated fit limit, and the other is the collar’s total length. Links can be removed to shorten the collar or added to make it longer, within the adjustment limit below.

• Maximum neck size: 21 in (53.34 cm).
• Overall collar length: 25 in (63 cm).
• Wire gauge in the technical specification: 4.0 mm.

Can the collar length be adjusted?

Yes. The collar’s interlocking links can be removed to shorten it or added to lengthen it, with up to four links added or removed. Each link has two blunt prongs, so adjustment is made through the linked collar construction rather than a buckle.

The title size designation gives 3.8 mm, while the technical wire-gauge specification gives 4.0 mm. The collar is identified as the Ultra-Plus model and includes a center plate and assembly chain. These construction details help distinguish it from a plain collar without a linked prong structure.

• Up to four links can be added or removed.
• Links interlock and each carries two blunt prongs.
• The center plate and assembly chain are part of the collar.

What are the collar’s material and origin?

The collar is made from chrome-plated steel and manufactured in Germany. HS-Germany INOX stamps appear on all rings, as well as on the center and fastener plates.

The steel construction, chrome plating and marked components are specific to this collar. The swivel is integrated for leash attachment, while the center plate and fastener plates form part of the collar assembly.

• Material: chrome-plated steel.
• Made in Germany.
• HS-Germany INOX stamps on rings, center plate and fastener plates.

The Herm Sprenger Ultra-Plus is suited to handlers looking for a German-made, adjustable prong training collar with a center plate and swivel leash connection, and who can use it properly under supervision. Its fit specification gives a maximum 21 in neck size, while its links allow adjustment by up to four links.