To connect two different size parallel pipes with the flexibility of spacing the pipes from each other use the pipe-to-pipe clamps. To connect two different size parallel pipes fixed back to back, use the pipe-to-pipe adapters. Each pipe-to-pipe assembly is sold in a kit of two. A kit of two pipe-to-pipe clamps includes eight clamp halves, four pieces of threaded rod and all necessary hardware. A kit of two pipe-to-pipe adaptors includes two welded pipe adapters, four clamp halves, eight pieces of threaded rod and all necessary hardware. Material is galvanized steel. If you need a configuration you don't see listed here, please call and let us build one for you.