Supplier & Distributor of Rubber Bellow Seal. Our product range also comprises of Dry Running Agitator Seal, Multi Spring Unbalanced Seal and Spring Unbalanced Seal. Item Code: LS20 Type LS 20 are most commonly used rubber bellow seal, Due to its compact design it can be easily mounted. TYPE LS 20 has a unique rubber bellow secondary seal, which provides a high degree of axial flexibility to compensate for lack of concentric of the shaft & misalignment & wear due to thrust movement of the shaft.