7/8 IMSA28 3-1/2 IMSA28-2 RR50130
Triple Square/Standard, mm, Chrome (1/2'')
Standard Length
16 STSM16E 107.7 63.6 29.9 STSM16E2
18 STSM18E 98.3 52.2 34.9 STSM18E2
10 STSM10E 89.4 51.3 23.1 STSM10E2
12 STSM12E 107.7 64.8 23.5 STSM12E2
14 STSM14E 109.5 63.4 26.9 STSM14E2
Long
10 STSM10LE 156.5 118.4 23.5 STSM10LE2
12 STSM12LE 145.8 107.7 23.5 STSM12LE2