Description This is barn door block made from premium material which ensures high level performance for your barn door. Its practical and special design provides a secure performance to prevent the door from to derailment. Easy and simple to install, durable and practical. Features - Color: Black. - Material: POM thermoplastic crystalline polymer. - Size: 2.40X2.40X0.95cm/0.94X0.94X0.37inch. - Mounted under the track, on the upper part of the door, to prevent the door from ejecting from the side when moving. - Easy and simple to install, durable and practical. - Made of premium material, it is durable and practical in use. - Unique design ensure it work smooth and stable. - Can help you fix the barn door and prevent it from sliding out.Package list: 5 x sets of barn door anti-jump pieces