diff --git a/src/jimgw/prior.py b/src/jimgw/prior.py
index 941cf933..433b385a 100644
--- a/src/jimgw/prior.py
+++ b/src/jimgw/prior.py
@@ -315,6 +315,14 @@ def __init__(
         self.chi_axis = chi_axis
         self.cdf_vals = cdf_vals
 
+    @property
+    def xmin(self):
+        return -self.amax
+
+    @property
+    def xmax(self):
+        return self.amax
+
     def sample(
         self, rng_key: PRNGKeyArray, n_samples: int
     ) -> dict[str, Float[Array, " n_samples"]]: