... 0.032 5/16" 8 16 1 20 60 100 22 0.035 3/8" 10 17 1 20 60 100 24 0.043 ... 1/2" 12.5 21 2 20 60 100 43 0.085 5/8" 16 25 2 ... 20 60 100 48 0.170 3/4' 19 28 2 20 60 ... Natural rubber; 2.Size: 1/4", 5/16", 3/8",1/2",5/8",3/4",1"3.Color: Red, blue, ... reinforcing layer ( second reinforcing layer for1/2",5/8",3/4",1")+ 8.outside bond layer; outside surface is mill finish, ...