diff --git a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/block/behavior/StackableBlockBehavior.java b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/block/behavior/StackableBlockBehavior.java
index cd82a04f7..161ffc81b 100644
--- a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/block/behavior/StackableBlockBehavior.java
+++ b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/block/behavior/StackableBlockBehavior.java
@@ -1,7 +1,6 @@
 package net.momirealms.craftengine.bukkit.block.behavior;
 
 import net.momirealms.craftengine.bukkit.api.CraftEngineBlocks;
-import net.momirealms.craftengine.bukkit.item.behavior.BlockItemBehavior;
 import net.momirealms.craftengine.bukkit.nms.FastNMS;
 import net.momirealms.craftengine.core.block.BlockBehavior;
 import net.momirealms.craftengine.core.block.CustomBlock;
@@ -11,60 +10,52 @@ import net.momirealms.craftengine.core.block.behavior.BlockBehaviorFactory;
 import net.momirealms.craftengine.core.block.properties.Property;
 import net.momirealms.craftengine.core.entity.player.InteractionResult;
 import net.momirealms.craftengine.core.entity.player.Player;
-import net.momirealms.craftengine.core.item.CustomItem;
 import net.momirealms.craftengine.core.item.Item;
-import net.momirealms.craftengine.core.item.behavior.ItemBehavior;
 import net.momirealms.craftengine.core.item.context.UseOnContext;
+import net.momirealms.craftengine.core.util.Key;
 import net.momirealms.craftengine.core.util.ResourceConfigUtils;
 import net.momirealms.craftengine.core.world.BlockPos;
 import net.momirealms.craftengine.core.world.World;
 import org.bukkit.Location;
 import org.bukkit.inventory.ItemStack;
 
+import java.util.HashSet;
+import java.util.List;
 import java.util.Map;
-import java.util.Optional;
+import java.util.Set;
 
 public class StackableBlockBehavior extends BukkitBlockBehavior {
     public static final Factory FACTORY = new Factory();
     private final Property<Integer> amountProperty;
+    private final Set<Key> allowItems;
 
-    public StackableBlockBehavior(CustomBlock block,Property<Integer> amountProperty) {
+    public StackableBlockBehavior(CustomBlock block,Property<Integer> amountProperty, Set<Key> allowItems) {
         super(block);
         this.amountProperty = amountProperty;
+        this.allowItems = allowItems;
     }
 
     @Override
     @SuppressWarnings("unchecked")
     public InteractionResult useOnBlock(UseOnContext context, ImmutableBlockState state) {
         Player player = context.getPlayer();
-        if (player.isSneaking()) {
+        if (player.isSecondaryUseActive()) {
             return InteractionResult.PASS;
         }
         Item<ItemStack> item = (Item<ItemStack>) context.getItem();
         if (item == null) {
             return InteractionResult.PASS;
         }
-        Optional<CustomItem<ItemStack>> optionalCustomItem = item.getCustomItem();
-        if (optionalCustomItem.isEmpty()) {
-            return InteractionResult.PASS;
-        }
-        CustomItem<ItemStack> customItem = optionalCustomItem.get();
-        for (ItemBehavior behavior : customItem.behaviors()) {
-            if (behavior instanceof BlockItemBehavior blockItemBehavior && blockItemBehavior.blockId().equals(customBlock.id())) {
-                int amount = state.get(this.amountProperty);
-                if (amount < this.amountProperty.possibleValues().getLast()) {
-                    ImmutableBlockState nextStage = state.cycle(this.amountProperty);
-                    World world = context.getLevel();
-                    BlockPos pos = context.getClickedPos();
-                    Location location = new Location((org.bukkit.World) world.platformWorld(), pos.x(), pos.y(), pos.z());
-                    if (CraftEngineBlocks.place(location, nextStage, UpdateOption.UPDATE_NONE, true)) {
-                        FastNMS.INSTANCE.method$ItemStack$consume(item.getLiteralObject(), 1, player.serverPlayer());
-                        player.swingHand(context.getHand());
-                    }
-                    return InteractionResult.FAIL;
-                }
-                return InteractionResult.PASS;
+        if (this.allowItems.contains(item.id()) && state.get(this.amountProperty) < this.amountProperty.possibleValues().getLast()) {
+            ImmutableBlockState nextStage = state.cycle(this.amountProperty);
+            World world = context.getLevel();
+            BlockPos pos = context.getClickedPos();
+            Location location = new Location((org.bukkit.World) world.platformWorld(), pos.x(), pos.y(), pos.z());
+            if (CraftEngineBlocks.place(location, nextStage, UpdateOption.UPDATE_NONE, true)) {
+                FastNMS.INSTANCE.method$ItemStack$consume(item.getLiteralObject(), 1, player.serverPlayer());
+                player.swingHand(context.getHand());
             }
+            return InteractionResult.FAIL;
         }
         return InteractionResult.PASS;
     }
@@ -75,7 +66,14 @@ public class StackableBlockBehavior extends BukkitBlockBehavior {
         @SuppressWarnings("unchecked")
         public BlockBehavior create(CustomBlock block, Map<String, Object> arguments) {
             Property<Integer> amount = (Property<Integer>) ResourceConfigUtils.requireNonNullOrThrow(block.getProperty("amount"), "warning.config.block.behavior.stackable.missing_amount");
-            return new StackableBlockBehavior(block, amount);
+            Set<Key> allowItems = new HashSet<>();
+            if (arguments.get("allow-items") instanceof List<?> list) {
+                for (Object obj : list) {
+                    if (obj == null) continue;
+                    allowItems.add(Key.of(obj.toString()));
+                }
+            }
+            return new StackableBlockBehavior(block, amount, allowItems);
         }
     }
 }