挪威采购需求：人孔，双密封人孔，排水提升钥匙，EN877，格栅，检查室盖

We are currently in search of a new supplier for couplers following the closure of our previous supplier's business. Our requirements include couplers with a diameter range from DN50 to DN135, as we need to ensure compatibility with our existing systems. Additionally, we are interested in couplers that come with an epoxy coating. Can you confirm if this is a solution your company can provide? We are looking for a reliable and cost-effective partnership moving forward, and we would appreciate any details about your product offerings, lead times, and pricing. Looking forward to your prompt response.