Usage Tips:Versatile Accessory: This set of 4 load stoppers is designed for use with roof brackets, crossbars, or T slot roofs. It's an essential accessory for securing your equipment during transportation.Secure Your Gear: These load stoppers prevent heavy items from moving during transport. They are designed to slide into the T channel of your rack, allowing you to secure items in place and can also be used as tie down points.Stainless SteelMaterial: Load Stops Replacement are made from 304 stainless steel with a thickness of 3mm, these load stoppers are built to last Their smooth surface has been brushed and polished for a burr free finish that will stand up to years of use.Adjustable and Convenient: These load stoppers can be moved according to the position of the item being secured. Equipped with hooks and closed rings, rope can be easily wrapped around them for added security.Package Includes: Each package includes 4 T Slot Truck Cross Bar load stoppers Specification: Material: Stainless Steel Size Chart: 11.9cm/4.69inch Package Includes: 4pcs T Slot Truck Cross Bar Note: Please allow slightly errors 1-2cm differences due to manual measurement.