Black leather strap with a stainless steel folding clasp. Lug Width: 20 mm. Band Width: 18 mm. Fits the following Breitling models with 20 mm lugs: Aerospace, Chrono Cockpit, Cockpit, Colt Auto II, Colt Chrono II, Colt GMT, Colt Quartz II, Navitimer Montbrillant, Superocean, Superocean Chrono