WOLF 1.37 XC , 2.37 E , 2.37 XC , 6. 37E , 37E , 537 , COMPACT PLUS 37 E , HBM36 COMPACT , HBM37E , HC37K , HE37 , EXPERT37E , POWER1500 , POWER EDITION 37 E MODEL - TECHNICAL SPECIFICATIONS LENGTH 366 mm CENTRAL BORE - mm OUTER BORE 68 / 7 mm INDEX OF CENTRAL BORE 52 / 30 mm CODE: 13286676 ORIGINAL CODE 4907 095 , 4907 096 , 4907 400 , VI37FM SR