Matco-Norca’s 452 Series Standard No Hub Couplings are UPC- and IPC-approved and conform to the latest editions of ASTM C1277/C564. They are available in sizes 1-½” through 10”. Sizes 1-½” to 4” contain two Type 310 stainless steel bands standard (with four bands available upon request); sizes 5” to 10” come with four bands standard (with six bands available upon request). They come with a neoprene gasket to provide a cushioning element in the joint. The 452 Series Heavy-Duty (H) No Hub Couplings, available in sizes 2” to 10”, 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 (depending on size) and feature specially designed bi-directional eyelets.