Great product, fixed the problem, was quick delivery.
SeaLand / Dometic Ball & Shaft Kit with Spring Cartridge. Fits EcoVac and 5000 Series Marine Toilets (except model 5006).
Also fits SeaLand / Dometic Traveler Marine Toilet model 110, 210, and 510-H.
Installation instructions are included in the Kit.
Fast shipping, product was exactly as described, price was reasonable.