OLI, top selling manufacturer of electric and pneumatic vibrators. The frequency is variable by adjusting the inlet pressure. No maintenance is required. Popular model: Ball type pneumatic vibrator S8 S10 S13 S16 S20 S25 S30 S36 K8 K10 K13 K16 K20 K25 K30 K36 Roller type pneumatic vibrator OR50 OR65 OR80 OR100 Turbine type pneumatic vibrator OT8 OT10 OT10S OT13 OT16 PT16S OT20 OT25 OT25S OT30 OT36 OT36S GT4 GT6 GT8 GT10 GT13 GT16 GT20 GT25 GT30 GT36 GT40 GT48