anki-3d-engine/ThirdParty/Bullet/data/tray/tray.urdf

<robot name="tray">
  <link name="tray_base_link">
    <contact>
      <lateral_friction value="0.5"/>
      <rolling_friction value="0.0"/>
      <contact_cfm value="0.0"/>
      <contact_erp value="1.0"/>
    </contact>
    <inertial>
      <origin rpy="0 0 0" xyz="0 0 0"/>
      <mass value="0"/>
      <inertia ixx="0" ixy="0" ixz="0" iyy="0" iyz="0" izz="0"/>
    </inertial>
    <visual>
      <origin rpy="0 0 0" xyz="0 0 0"/>
      <geometry>
        <mesh filename="tray_textured4.obj" scale="0.5 0.5 0.5"/>
      </geometry>
      <material name="tray_material">
        <color rgba="0.7 0.7 0.7 1"/>
      </material>
    </visual>
    <collision>
      <origin rpy="0 0 0" xyz="0 0 0"/>
      <geometry>
        <mesh filename="tray_textured4.obj" scale="0.5 0.5 0.5"/>
      </geometry>
    </collision>
  </link>
</robot>