The JCM Industries DI Transition Coupling with stainless steel bolts is engineered for connecting ductile iron pipes with a size range of 4" (4.80 - 5.10) to 4". This coupling is designed to withstand harsh conditions, ensuring durability and reliability in various applications. The stainless steel bolts provide enhanced corrosion resistance, making it suitable for water and wastewater systems. This product complies with industry standards, ensuring a secure and leak-free connection. Ideal for contractors, it simplifies installation and enhances the longevity of piping systems.