diff --git a/src/storage.cc b/src/storage.cc
index 418fdf171..1c92e2096 100644
--- a/src/storage.cc
+++ b/src/storage.cc
@@ -75,9 +75,10 @@ void Storage::EnterNotify() {
   buy_policy.Start();
 
   if (out_commods.size() == 1) {
-    sell_policy.Init(this, &stocks, std::string("stocks"))
-        .Set(out_commods.front())
-        .Start();
+    sell_policy.Init(this, &stocks, std::string("stocks"), 1e+299, false, sell_quantity)
+      .Set(out_commods.front())
+      .Start();
+
   } else {
     std::stringstream ss;
     ss << "out_commods has " << out_commods.size() << " values, expected 1.";
diff --git a/src/storage.h b/src/storage.h
index 7282acce2..e360193b3 100644
--- a/src/storage.h
+++ b/src/storage.h
@@ -32,6 +32,7 @@ namespace cycamore {
 /// in_recipe (optional) describes the incoming resource by recipe
 ///
 /// @section optionalparams Optional Parameters
+/// sell_quantity restricts selling to only integer multiples of this value
 /// max_inv_size is the maximum capacity of the inventory storage
 /// throughput is the maximum processing capacity per timestep
 ///
@@ -162,6 +163,17 @@ class Storage
                       "range": [0, 12000]}
   int residence_time;
 
+  #pragma cyclus var {"default": 0,\
+                      "tooltip":"sell quantity (kg)",\
+                      "doc":"material will be sold in integer multiples of this quantity. If"\
+                      " the buffer contains less than the sell quantity, no material will be"\
+                      " offered", \
+                      "uilabel":"Sell Quantity",\
+                      "uitype": "range", \
+                      "range": [0.0, 1e299], \
+                      "units": "kg"}
+  double sell_quantity;
+
   #pragma cyclus var {"default": 1e299,\
                      "tooltip":"throughput per timestep (kg)",\
                      "doc":"the max amount that can be moved through the facility per timestep (kg)",\