=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 200 OK
Server: nginx
Date: Wed, 07 Aug 2019 03:36:47 GMT
Content-Type: text/html
Connection: close
Vary: Accept-Encoding
Last-Modified: Thu, 08 Nov 2018 15:04:27 GMT
X-Cacheable: SHORT
Vary: Accept-Encoding,Cookie
Cache-Control: max-age=600, must-revalidate
ETag: W/&quot;a19-57a288d0d4c16-gzip&quot;
X-Cache: HIT: 1
X-Pass-Why: 
X-Cache-Group: normal
Accept-Ranges: bytes

Request headers
================
HEAD / HTTP/1.1
Host: surefiremedical.com
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36
Accept: */*
Referer: https://bme.fiu.edu
Connection: close


Link is valid.