Check the listing for details. Ironridge, Stopper Sleeve, 40mm, Black. Color: Black, Condition: New. Listed at 100.00 USD. This Ironridge XR model stopper sleeve is a must-have for anyone looking to enhance their solar power system. Made in the United States, this 40mm black sleeve is designed to securely fit your solar panels and prevent any potential damage from wind or debris. The sleeve is compatible with a range of solar panel sizes and is easy to install, making it a great addition to any home improvement project. The Ironridge brand is known for its high-quality alternative energy supplies, and this stopper sleeve is no exception. Its durable design and reliable performance make it a top choice for solar power enthusiasts across the United States. Whether you're looking to add to your solar panel collection or simply want to protect your existing panels, this Ironridge XR stopper sleeve is the perfect solution.