Pride flaps are black rubber two piece assemblies. The parts are not available separately, they are sold together. These flaps are generally quite durable and often times the flap size is completely worn off, in which case you will need to measure the flap to see which one you need. We measure inside of the U shaped part of the flap which is the smallest hole that your pet needs to go through. If you measure the outside of the flap you will end up with the wrong flap, so be careful.
Pride flaps are a direct replacement for Johnson and Pet Safe doors with 2 piece flaps for medium and larger sizes. Although this isn't the best picture, the Pride flaps have the same center flap and U shaped flap. M-2 or medium is the same as MD400A, L-2 or large is the same as LD500A, and XL-4 or extra large is the same as XLD600A.
We have had just a handful of out of hundreds of customers tell us that their MD400 flap didn't fit a plastic framed Johnson door correctly. The flap can be trimmed to work if you'd rather not replace the door. We did have one customer who said that the MD400 flap was too long for his Johnson panel pet door for a sliding door and he ended up returning it.
The S-2 or small flap is similar in size to the SD300A but mounts differently.
Pride uses Masonite or pressboard locking covers, these covers do not fit Johnson doggy doors.