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The 452 Series No Hub Couplings, in both standard and heavy-duty versions, are for use in joining hubless, cast iron pipe applications. Both couplings provide ease of installation and permanent sealing solutions, as well as proper pipe alignment. They are available in sizes 1-1/2- to 10-inch. Sizes 1-1/2- to 4-inch contain two Type 310 stainless steel bands standard; 5- to 10-inch sizes come with four bands standard. The couplings include a neoprene gasket to provide a cushioning to absorb shock and vibration. The Heavy-Duty (H) No Hub Couplings, available in 2- to 10-inch sizes, consist of a neoprene rubber gasket and a heavy gauge stainless steel (300 series) clamp assembly. These couplings are available with four or six bands, and feature specially designed bi-directional eyelets. The H Series Couplings’ metal components meet or exceed ASTM C1540-C564 requirements.