This is an option, without a round carabiner. This is a heater cover for Marukan's cuddling heater♪ With this, you can relax in winter! Heater cover to prevent mischief & protect your precious pet from burns Made of anti-pill material, it's highly resistant to chewing and extremely durable! Maintains a moderate warmth It doesn't let heat escape too much, trapping a comfortable warmth inside. Prevents chewing and mischief Hides the heater body and cord with durable material, preventing electric shock and heater damage. Prevents burns Prevents pets from directly touching the heater, reducing the risk of low-temperature burns. Easy to clean Anti-pill material makes it difficult for dirt to stick, and it can be washed, removing loose hair for hygiene. For the fittings, Please choose either compact fittings or stainless steel eyelets, and let us know in the transaction after purchase ♥