This is a genuine Dana/Spicer pinion shim kit for the Dana 44 front and rear axles found in some Jeep JK’s. This kit includes the following shims:
41214-11 0.040″
41214-13 0.042″
41214-15 0.044″
41214-17 0.046″
41214-19 0.048″
41214-21 0.050″
41214-23 0.052″
41214-25 0.054″