The Fluval FX5 Lock Clamp is a replacement part for the Fluval FX5 Model. The Fluval Fx5 provides power with performance and pumps over 900 GPH. Please Note : The Fluval FX5/FX6 Replacement part may either ship to you as a white piece or as a grey and orange piece. Both pieces work for the Fluval FX5/FX6.