Chrome Plated Quick Release Dog Training Collar, 21-Inch Medium 3.0mm


✅ Editor’s Pick


✈️ Airline & Flight Travel


🧳 Under-Seat Carry-On


🌬️ Cabin Ventilation

📸 Product Images

Chrome Plated Quick Release Dog Training Collar, 21-Inch Medium 3.0mm

Current Amazon Price
EUR43.00 - EUR32.68
(as of Jan 19, 2026 18:25:09 UTC)
Prices and availability can change. Amazon’s price at checkout applies.

🧭 How This Flight Carrier Was Evaluated

  • 📏 Under-seat fit (dimensions, flexibility, structure)
  • 🧾 Airline-policy alignment (size limits vary by airline/aircraft)
  • 🌬️ Ventilation and airflow (mesh coverage)
  • 🔒 Security (zippers, clip points, closure reliability)
  • 🧳 Airport handling (carry comfort, stability while walking)
  • 🧼 Cleaning (removable pad, wipeable materials)

📏 Flight Fit Check (Under-Seat Compatibility)

  • 🧾 Compare the carrier’s listed dimensions with your airline’s under-seat requirements
  • 🐕 Confirm your dog can turn and lie down comfortably inside the interior space
  • 🧳 Soft-sided carriers typically compress better under the seat during flight
📝 Airlines and aircraft layouts differ; approval depends on measurements and under-seat clearance.

🛫 Boarding & Layovers (What Matters in Airports)

  • 🧳 Carry comfort: strap/handles for longer terminal walks
  • 🔒 Secure closures: reduces risk during security checks and crowded gates
  • 🌬️ Ventilation: useful during boarding lines and delays
  • 🧼 Easy cleanup: helpful for long travel days


⚙️ Airline & Flight Travel Overview

✈️ Best Use In-cabin flights, under-seat carry-on pet travel
📏 Under-Seat Fit Flexible structure to adapt to under-seat space (model dependent)
🌬️ Ventilation Mesh panels designed to maintain airflow
🔒 Security Closures aimed at reliable travel use (zippers/clips vary by model)
🧼 Cleaning Removable pad or wipe-clean materials (model dependent)

See reviews + more photos on Amazon


👉 View on Amazon (Reviews + Photos)

🌟 Pros & Cons

✅ Pros

  • ✈️ Built around in-cabin flight needs
  • 🌬️ Breathable mesh for airflow
  • 🧳 Comfortable to carry through airports
  • 🔒 Secure closures for travel environments (model dependent)
⚠️ Cons

  • 📏 Under-seat clearance varies by airline and aircraft
  • 🐕 Fit depends on dog measurements and carrier interior space


📝 Product Details

Herm Sprenger Chrome Plated Training Collar with Quick Release features HS Scissor Snap that allows fast release of the dog. Herm Sprenger training collars are designed so pressure is spread evenly around the dog’s neck. The ends of the links are carefully rounded to provide safe correction. Herm Sprenger Training Collars are manufactured in Germany from the finest quality of materials and craftsmanship. The snap also enables the collar to be easily fastened around the neck. The collar must be fitted correctly in order to work properly, fitting just below the dog’s ears. Links may be added or removed to make a comfortable snug fit. Attach the lead to the “D” ring at the top of the collar. These Quick Release collars are available in 4 sizes: Small 2.25mm, 16” neck, maximum weight 44 lbs; Medium 3.0mm, 21” neck, maximum weight 88 lbs; Large 3.2mm, 23” neck, maximum weight 88 lbs; Extra Large 4.0mm, 25” neck, maximum weight 154 lbs. All collars have a limited guarantee against breakage, tarnish or rust.
Is Discontinued By Manufacturer ‏ : ‎ No
Product Dimensions ‏ : ‎ 13 x 1.5 x 1 inches; 0.32 ounces
Item model number ‏ : ‎ 6421H
Date First Available ‏ : ‎ February 5, 2007
Manufacturer ‏ : ‎ Pet Supply Imports
ASIN ‏ : ‎ B0009YUFMK
Best Sellers Rank: #14,735 in Pet Supplies (See Top 100 in Pet Supplies) #14 in Dog Pinch Collars
Customer Reviews: 4.6 4.6 out of 5 stars (5,609) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
Herm. Sprenger Prong Collar, 21-22 inches overall length; wire gauge 3 mm
Designed for dogs with the NECK SIZE UP To 18 inches
High quality chrome plated steel; Built for safety and strength
Features a quick release snap
Made in Germany

🏁 Final Assessment

As an airline-approved dog carrier for airline & flight travel, this option is most appropriate for
owners seeking an under-seat, in-cabin carrier with ventilation and travel handling suited to airports, boarding lines, and flights.
Performance depends on matching the carrier’s dimensions to airline requirements and choosing the correct size for the dog.

  • ✅ Best match: in-cabin pet travelers with small dogs
  • ✅ Best use: flights, airports, and layovers
  • ✅ Priority features: under-seat fit, airflow, secure closures

If the size and materials match what you need, check today’s price and the latest reviews before you decide.


🛒 Get It on Amazon (Check Availability)


❓ FAQ: Airline & Flight Travel

Does “airline-approved” mean it fits every airline?

No. Under-seat dimensions and pet policies vary by airline and aircraft. Compatibility depends on carrier measurements and airline limits.

What matters most for in-cabin flights?

Under-seat fit, ventilation, secure closures, and carry comfort for airports and boarding lines.

How do I choose the right size for my dog?

Compare your dog’s length/height to the carrier’s interior dimensions listed on the retailer page.



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Prices and availability are subject to change.

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