<https://www.freediveshop.com/shop/spearguns/speargun/jbl-516-fm-6mm-male-adapter/#product>
<http://schema.org/description>
"JBL 5/16\" FM to 6mm Male Adapter\r\nJBL 5/16\" FM to 6mm Male Adapter\r\n\r\n\r\n5/16\" FM to 6mm Male Adapter.\r\n\r\nhttp://www.jblspearguns.com/pdf/Spearpoints_Parts_List.pdf"
<https://www.freediveshop.com/shop/spearguns/speargun/jbl-516-fm-6mm-male-adapter/>