SENQCIA Inspire Series SBR riveted Seal Guard roller chain is manufactured . These solid bushing/solid roller chains utilize stainless steel spring washer seals and do not require secondary lubrication. Solid cold forged bushings extend chain wear life and greatly reduce break-in wear. Packaged chains are supplied with a necessary connecting link to join the ends. Offset links are not available for Seal Guard chains. This chain is packaged in a 10ft box.