Features: Rakiyada's upgraded toilet valves features ultrasonic welding technology for enhanced durability, cracks resistance, and extended life , making it a stable solution for bathroom maintenance. Designed with compatible specifications (Series 300 321), this valves replaces OEM parts 385311641/385311658 using freeze resistant polymer and premium rubber seals for leak proof performances. Ideal for owners seeking to upgrade or repair their vehicles's flushing systems, especially those addressing recurring leaks or odor issues in sanitation setups. Perfect for maintaining clean and functional toilets during road trips, campground stays, or seasonal storage where stable water control prevents waste buildup. Includes straightforward installation with online video guidance, effectively resolving common flushing inefficiencies while meeting original factory standards for pressure tolerance and component integrity. Specifications: Component : plastic Height: about 104.5mm/4.11inch Part number: 385311641 Package Includes: 1 set Toilet Flush valves note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.