Here is my HTML markup:
<form id="post" class="acf-form" action="" method="post" >
<div style="display:none">
<script type="text/javascript">
acf.o.post_id = "new";
</script>
<input type="hidden" name="acf_nonce" value="4ceed66667" />
<input type="hidden" name="post_id" value="new" />
<input type="hidden" name="return" value="http://localhost:8888/product/submit-product?updated=true" />
<div id="wp-acf_settings-wrap" class="wp-core-ui wp-editor-wrap tmce-active">
<div id="wp-acf_settings-editor-tools" class="wp-editor-tools hide-if-no-js">
<a id="acf_settings-html" class="wp-switch-editor switch-html" onclick="switchEditors.switchto(this);">Text</a>
<a id="acf_settings-tmce" class="wp-switch-editor switch-tmce" onclick="switchEditors.switchto(this);">Visual</a>
<div id="wp-acf_settings-media-buttons" class="wp-media-buttons"><a href="#" id="insert-media-button" class="button insert-media add_media" data-editor="acf_settings" title="Add Media"><span class="wp-media-buttons-icon"></span> Add Media</a></div>
</div>
<div id="wp-acf_settings-editor-container" class="wp-editor-container"><textarea class="wp-editor-area" rows="20" cols="40" name="acf_settings" id="acf_settings"></textarea></div>
</div>
</div>
<div id="poststuff">
<div id="titlediv">
<div id="titlewrap"><label class="screen-reader-text" id="title-prompt-text" for="title">Enter title here</label><input type="text" name="post_title" size="30" id="title" placeholder="Enter product title here" autocomplete="off"></div>
</div>
<div id="wp-frontendform-wrap" class="wp-core-ui wp-editor-wrap html-active">......
</div>
<div id="acf_75" class="postbox acf_postbox default">......
</div>
<div><input type="hidden" name="post_type" value="products" /></div>
<!-- Submit -->
<div class="field">
<input type="submit" value="Submit" />
</div>
<!-- / Submit -->
</div>
<!-- <div id="poststuff"> -->
</form>
The html_after field is <div><input type="hidden" name="post_type" value="products" /></div>
Thanks.
