From Amazon
Martin MA175PK3 Authentic Acoustic - SP - 80/20 Bronze 3 Pack Custom Light ( 11-52 )
GAK
Martin MA175PK3 Authentic Acoustic SP 80/20 Bronze, Custom Light, 11-52, 3 Pack
guitar.co.uk
Martin MA175PK3 Authentic Acoustic SP 80/20 Bronze Custom Light 3-Pack