0.011uF Sprague, 4-lead:
http://www.ebay.com/itm/SPRAGUE-PP16...YAAOxy6MBSQKOh
The "s11" is the value - a single zero, followed by two ones.
PP=polypropylene
16=1600V
S11=.011uf (S=Single, D=dual, P= none, D11 would be .0011uf, P11 would be .11uF)
S=Critical safety component