TTD/ POTW Store & Home › Replacement Sponge For GFG354 Image 1 of 1 Replacement Sponge For GFG354 £9.61 Replacement sponge for the GFG354, Hydro sponge with extended pole. Quantity: Add To Cart Added! Replacement sponge for the GFG354, Hydro sponge with extended pole.