Additional Product Information on the Tanaka TBL 4600 back pack blower. Tanaka knapsack blower for commercial use with multi-point anti-vibration frame for maximum operator comfort. Swivel/flexible blower tubes easy to reach any angles without shifting body position, comfortable front handle, extra large fuel tank for extended periods of use, pivoting engine control arm for easy access to the throttle and stop switch. Vibration and Sound Pressure Level (EU model) Testing and average are made according to CE Regulations. Column 1 Model number, column 2 Vibration Level (m/s2), last column Sound Pressure Level/db (A)