Chevron Omega Chains #1935 (Flat) (3.7 mm – 13.3 Gr./Ft.) #1994 (Flat) (6.4 mm – 23.3 Gr./Ft.) #1210 (Domed) (3.9 mm – 13.7 Gr./Ft.) #1995 (Domed) (6.5 mm – 23.7 Gr./Ft.)