O-ring kit for the Hitachi-EX1200 quarry excavator The kit includes frequently used O-ring sizes from global manufacturers Parker and Trelleborg, in an amount corresponding to the frequency of wear. It is delivered in a strong plastic container, tightly closed with latches, seals are placed in separate compartments, according to size. 21 size of the most common NBR O-ring seals on the HITACHI EX1200 excavator Total number of seals 357 pcs. * All manufacturer names, part numbers, and descriptions are used for reference only. The seal kit is assembled from high-quality O-rings.