Mechanical dual-flush outlet valve. Manually operated, fits into most ceramic and plastic cisterns with internal heights of 330-408mm. Designed for close-coupled or low level toilet cisterns. 51mm (2") outlet. Water Efficient Water Saving Dual-Flush Easy to Install Manufactured in the UK Manually Operated Fits Most Ceramic & Plastic cisterns with Internal Heights of 330-408mm Easy to Install & Designed for Close-Coupled or Low Level Toilet Cisterns 51mm (2") outlet with optional (1.5") adaptor Supplied with Chrome Plated Pushbutton Complies with Regulators Specifications Water Efficient Water Saving Dual-Flush Easy to Install Manufactured in the UK Manually Operated Fits Most Ceramic & Plastic cisterns with Internal Heights of 330-408mm Easy to Install & Designed for Close-Coupled or Low Level Toilet Cisterns 51mm (2") outlet with optional (1.5") adaptor Supplied with Chrome Plated Pushbutton Complies with Regulators Specifications