How pass the own class to virtualType tag with array argument in di.xml

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<virtualType name="categoryFilterList" type="Magento\Catalog\Model\Layer\FilterList">
    <arguments>
        <argument name="filters" xsi:type="array">
            <item name="attribute" xsi:type="string">Magento\CatalogSearch\Model\Layer\Filter\Attribute</item>
            <item name="price" xsi:type="string">Magento\CatalogSearch\Model\Layer\Filter\Price</item>
            <item name="decimal" xsi:type="string">Magento\CatalogSearch\Model\Layer\Filter\Decimal</item>
            <item name="category" xsi:type="string">Magento\CatalogSearch\Model\Layer\Filter\Category</item>
    // i want to pass the my own class like below
      <item name="customFilter" xsi:type="string">Vendor\CustomFilter\Model\Layer\Filter\CustomFilter</item>
        </argument>
    </arguments>
</virtualType>

Added my module di.xml file like below but it not working.

<virtualType name="categoryFilterList" type="Magento\Catalog\Model\Layer\FilterList">
<arguments>
        <argument name="filters" xsi:type="array">
	<item name="customfilter" xsi:type="string">Vendor\CustomFilter\Model\Layer\Filter\CustomFilter</item>
    </argument>
    </arguments>
</virtualType>

Can you advice me.