The latch on a Von Duprin 98/9952 Pool Gate Device is a standard 98/99 Rim Device latch and can therefore use any strike compatible with a 98/99 Rim Exit Device.
The 98/9952 Pool Gate Device comes standard with a 699 strike designed to be mounted to the face of a post that is flush with the push face of the gate (reference Step 19 of the Von Duprin 98/9952 Exterior Gate Exit Device English (allegion.com) Installation Instructions).
If the post the strike will be mounted to is not flush with the push face of the gate, but is more like a hollow metal frame that the strike will need to be mounted on the side of the post, a 299, 264, or 1439 strike could be used instead.
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