1. according to antioxidant fragmentation respectively 52MPa (7500psi), 69MPa (10000psi) and 86MPa(12500psi), 102MPa (15000psi) standing times for four series.

2. according to the volume density can be divided into: low density, medium density,high density,.

3. according to specifications are respectively: 12-20 mesh, 16-20 mesh, 16-30 mesh, 20-40 mesh, 30-50 mesh, 40-60 mesh, 40-70 mesh, 70-100 mesh, etc.

To meet the demands of domestic oil Wells,customers can choose different specifications of products according to different strength and depth.