1.Crown
2.Dish
3.Bowl lip
4.Top land
5.2nd and 3rd ring lands
6.Compression ring grooves
7.Pin retair ring groove
8.Pin boss
9.Crown thickness
10.Under crown surface
11.crown thickness
12 Oil return to drain holes
13.skirt
14.Skirt tail
15. Boss spacing
16 Pin bore diameter
17 Skirt length
18. Lower skirt length
19. Compression height
20 Total length
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