How to frame the weight of the product in the tag in the woocomerce product?

Question

WooCommerce

here is the code to display this line

apply_filters( 'woocommerce_order_item_name', $item->get_name(), $item, false ) ;

here is the html where this header is

<h4 class="product-widget-title"><a href="https://xn----htbcxngmi.xn--p1ai/aktiv-25/?attribute_pa_size=medium" title="СТОПЛЁД Актив -25 - 25кг"> СТОПЛЁД Актив -25 - 25кг </a> </h4>

need so

<h4 class="product-widget-title"><a href="https://xn----htbcxngmi.xn--p1ai/aktiv-25/?attribute_pa_size=medium" title="СТОПЛЁД Актив -25 - 25кг"> СТОПЛЁД Актив -25 -  <span class="custom-weight">25кг<span> </a> </h4>