3. Mophorn 800W Hand Held Electric Concrete Vibrator 4200 VPM 3/4 HP with 3.9; 4. DEWALT DCE531M1 20V MAX Pencil Vibrator Kit; 5. Stark 31cc Vibratory Screed Gas Power Screed Engine EPA Concrete Surface; 6. 3/4 HP Concrete Vibrator 13,000 vibrations per minute; 7. Hand Held Concrete Vibrator 1 HP 750W Electric Vibrator 13000 Vibrations per; 8.