This Shark steam mop replacement head is designed to fit the S3501 model. The triangle shape is perfect for getting into corners and tight spaces, while the plastic material ensures durability. The gray color matches the original mop and it is suitable for use on tile and other hard floors. With a width of 11.75 inches, it covers a large area for efficient cleaning. This item is used and is in great working condition. Get your floors sparkling clean with this Shark steam mop replacement head.