Universal slotted standard, 1/2″ on 1″ centers. From 3′ to 8’high in Chrome or zinc. In stock in 6′ lengths. Also available as Heavy Duty / Imperial line, which is 1″ on 2″ centers. From 4′ to 8′ in chrome or zinc. Were you looking for another finish? If you need antique bronze, brass, white powder coated, or any other finish, please reach out for a quote.