20mm 6AL4V Titanium watch buckle and tongue. 300 series stainless crossbar with M1.6 double screws.
Media Blasted with Tumbled finish. The Tumbled finish adds a random pattern of marks to the piece which allows end-user marking to blend in to the finish.
Buckle to strap fitting should be done by a qualified strapmaker. The RIS crossbar measures 2.2mm in diameter. Tongue thickness is 3.3mm. You're strapmaker will need to be consulted to determine if this thickness will work with their strap.