diff --git a/src/main/java/ru/bclib/complexmaterials/ComplexMaterial.java b/src/main/java/ru/bclib/complexmaterials/ComplexMaterial.java
index c533a27b..f67ef314 100644
--- a/src/main/java/ru/bclib/complexmaterials/ComplexMaterial.java
+++ b/src/main/java/ru/bclib/complexmaterials/ComplexMaterial.java
@@ -4,6 +4,7 @@ import com.google.common.collect.Lists;
 import com.google.common.collect.Maps;
 import net.fabricmc.fabric.api.item.v1.FabricItemSettings;
 import net.fabricmc.fabric.api.object.builder.v1.block.FabricBlockSettings;
+import net.minecraft.resources.ResourceLocation;
 import net.minecraft.tags.Tag;
 import net.minecraft.world.item.Item;
 import net.minecraft.world.level.block.Block;
@@ -19,8 +20,8 @@ import java.util.List;
 import java.util.Map;
 
 public abstract class ComplexMaterial {
-	private static final Map<Class<? extends ComplexMaterial>, List<BlockEntry>> BLOCK_ENTRIES = Maps.newHashMap();
-	private static final Map<Class<? extends ComplexMaterial>, List<ItemEntry>> ITEM_ENTRIES = Maps.newHashMap();
+	private static final Map<ResourceLocation, List<BlockEntry>> BLOCK_ENTRIES = Maps.newHashMap();
+	private static final Map<ResourceLocation, List<ItemEntry>> ITEM_ENTRIES = Maps.newHashMap();
 	private static final List<ComplexMaterial> MATERIALS = Lists.newArrayList();
 	
 	private final List<BlockEntry> defaultBlockEntries = Lists.newArrayList();
@@ -105,7 +106,7 @@ public abstract class ComplexMaterial {
 	
 	private Collection<BlockEntry> getBlockEntries() {
 		List<BlockEntry> result = Lists.newArrayList(defaultBlockEntries);
-		List<BlockEntry> entries = BLOCK_ENTRIES.get(this.getClass());
+		List<BlockEntry> entries = BLOCK_ENTRIES.get(this.getMaterialID());
 		if (entries != null) {
 			result.addAll(entries);
 		}
@@ -114,7 +115,7 @@ public abstract class ComplexMaterial {
 	
 	private Collection<ItemEntry> getItemEntries() {
 		List<ItemEntry> result = Lists.newArrayList(defaultItemEntries);
-		List<ItemEntry> entries = ITEM_ENTRIES.get(this.getClass());
+		List<ItemEntry> entries = ITEM_ENTRIES.get(this.getMaterialID());
 		if (entries != null) {
 			result.addAll(entries);
 		}
@@ -129,6 +130,8 @@ public abstract class ComplexMaterial {
 		return modID;
 	}
 	
+	public abstract ResourceLocation getMaterialID();
+	
 	protected void addBlockEntry(BlockEntry entry) {
 		defaultBlockEntries.add(entry);
 	}
@@ -137,20 +140,20 @@ public abstract class ComplexMaterial {
 		defaultItemEntries.add(entry);
 	}
 	
-	public static void addBlockEntry(Class<? extends ComplexMaterial> key, BlockEntry entry) {
-		List<BlockEntry> entries = BLOCK_ENTRIES.get(key);
+	public static void addBlockEntry(ResourceLocation materialName, BlockEntry entry) {
+		List<BlockEntry> entries = BLOCK_ENTRIES.get(materialName);
 		if (entries == null) {
 			entries = Lists.newArrayList();
-			BLOCK_ENTRIES.put(key, entries);
+			BLOCK_ENTRIES.put(materialName, entries);
 		}
 		entries.add(entry);
 	}
 	
-	public static void addItemEntry(Class<? extends ComplexMaterial> key, ItemEntry entry) {
-		List<ItemEntry> entries = ITEM_ENTRIES.get(key);
+	public static void addItemEntry(ResourceLocation materialName, ItemEntry entry) {
+		List<ItemEntry> entries = ITEM_ENTRIES.get(materialName);
 		if (entries == null) {
 			entries = Lists.newArrayList();
-			ITEM_ENTRIES.put(key, entries);
+			ITEM_ENTRIES.put(materialName, entries);
 		}
 		entries.add(entry);
 	}
diff --git a/src/main/java/ru/bclib/complexmaterials/WoodenMaterial.java b/src/main/java/ru/bclib/complexmaterials/WoodenMaterial.java
index 049879b2..3c6c8070 100644
--- a/src/main/java/ru/bclib/complexmaterials/WoodenMaterial.java
+++ b/src/main/java/ru/bclib/complexmaterials/WoodenMaterial.java
@@ -1,8 +1,10 @@
 package ru.bclib.complexmaterials;
 
+import com.google.common.collect.Lists;
 import net.fabricmc.fabric.api.item.v1.FabricItemSettings;
 import net.fabricmc.fabric.api.object.builder.v1.block.FabricBlockSettings;
 import net.fabricmc.fabric.api.registry.FlammableBlockRegistry;
+import net.minecraft.resources.ResourceLocation;
 import net.minecraft.tags.BlockTags;
 import net.minecraft.tags.ItemTags;
 import net.minecraft.tags.Tag;
@@ -11,6 +13,7 @@ import net.minecraft.world.item.Items;
 import net.minecraft.world.level.block.Block;
 import net.minecraft.world.level.block.Blocks;
 import net.minecraft.world.level.material.MaterialColor;
+import ru.bclib.BCLib;
 import ru.bclib.api.TagAPI;
 import ru.bclib.blocks.BaseBarkBlock;
 import ru.bclib.blocks.BaseBarrelBlock;
@@ -33,10 +36,14 @@ import ru.bclib.blocks.BaseWoodenButtonBlock;
 import ru.bclib.blocks.StripableBarkBlock;
 import ru.bclib.blocks.WoodenPressurePlateBlock;
 import ru.bclib.complexmaterials.entry.BlockEntry;
+import ru.bclib.complexmaterials.entry.ItemEntry;
 import ru.bclib.config.PathConfig;
 import ru.bclib.recipes.GridRecipe;
 
+import java.util.List;
+
 public class WoodenMaterial extends ComplexMaterial {
+	public static final ResourceLocation MATERIAL_ID = BCLib.makeID("wooden_material");
 	public final MaterialColor planksColor;
 	public final MaterialColor woodColor;
 	
@@ -51,6 +58,11 @@ public class WoodenMaterial extends ComplexMaterial {
 		return FabricBlockSettings.copyOf(Blocks.OAK_PLANKS).materialColor(planksColor);
 	}
 	
+	@Override
+	public ResourceLocation getMaterialID() {
+		return MATERIAL_ID;
+	}
+	
 	@Override
 	protected void initTags() {
 		addBlockTag(TagAPI.makeBlockTag(getModID(), getBaseName() + "_logs"));