The Petrostar PFS-1 Advanced Ball-Activated Frac Sleeve has all the proven features of the conventional Ball-Activated Frac Sleeve with the additional benefit of selective zone isolation. The Advanced Frac Sleeve is ran as part of the conventional Multi-Stage Frac system and after the sleeve is opened utilizing ball drop technology, the piston can then be drilled out and the sleeve can be closed/opened using the activation tool on coil.