The H45S Vibrator Head 1.8 inch diameter, 12 inch Long
It is compatible with SM0S, SM1S, SM2S, SM3S, SM4S, SM5S, SM7S, SM9S Wacker Neuson concrete vibrator shafts.
It is compatible with the Wacker Neuson electric motors concrete vibrator motors models M1500 and M2500. It is compatible with the BV50H gas powered concrete vibrator motor