Robby, it will depend on the wedge's loft (which will effect the length of shaft that is installed) and the type of shaft you choose.  True Temper Dynamic Gold shafts are standard for Vokey SM4 wedges, in R300, R400, S200, S300, S400 or  X100 flexes, and will range in weight from 127-132 grams.  Custom shafts are also available, however.  Check out the options at this link:

http://media.titleist.com/images/titleist/pdfs/US/2013/2013_Custom_Options_Book_US/html/index.html 

Thanks.