DIMENSIONS LENGTH (MM) 6*7mm 197 6*8mm 196 7*9mm 195 8*9mm 194 8*10mm 200 10*11mm 211 10*12mm 220 12*13mm 230 12*14mm 233 14*15mm 243 14*17mm 247 16*17mm 270 17*19mm 259 18*19mm 276 20*22mm 299 21*23mm 300 24*27mm 329 STANDARD (SAE) DIMENSIONS LENGTH (MM) 3/8"*7/16" 213 5/8"*11/16" 260 3/4"*7/8" 282 1/2"*9/16" 231