Qty 5 9910-1040080 Diaphragm
Qty 10 9910-770571 O-Ring
Hypro/Pentair is no longer distributing the 9910 series of diaphragm pumps, components, and related parts. Products with Hypro labeling will be unavailable soon.
I have an old d1265 Hypro that they don't make anymore but Sprayer Depot had the diaphragm kit for it, it fit perfectly, running great.
Glad we could help! Happy Spraying!