This article contains the FAQs for the S3901 Series Shark® Lift-Away Professional Steam Pocket® Mop. This supports the following SKUs S3901, S3901A, S3901A_N, S3901C, S3901C_N, S3901D, S3901D_N, S3901K_N, S3901Q, S3901Q_N, S3901W, S3901WC, S3901WC_N, S3901WM, S3901WMC, S3901WM_N, S3901W_N and S3901_N.