This is the option without a round carabiner. This is a heater cover for Marukan's Yorisoi 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 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 stain-resistant and washable, removing loose fur for hygiene. Hardware options: Please choose either compact hardware or stainless steel eyelets and inform us after purchase♥ If there is no comment, we will use stainless steel eyelets♪