All synthetic mop yarn resists abrasive floor surfaces such as quarry tile for long mop performance. Yarn blend absorbs 4-5 times the mop's weight. Colors are perfect for a color-coding system and resist mop graying for like-new appearance. Head Type: Wet Mop; Application: Floor Maintenance; Mop Head Style: Cut End. ~ Includes six wet mop heads per case.RCPF137SBL. F137SBL. Rubbermaid Rubbermaid Synthetic Wet Mop Heads, Blue, 24 Oz, 5-in. Blue Headband.