Features: This wrench slips onto the filter housing to aid in the replacement of filter cartridges, easy for using. Fits all standard 10 inch water filter housings. Stronger membrane cup design to prevent cracking. Made of premium pp material, durable long time service. Tighten specific law on the first hand clockwise filter bottle, so a half turn with a wrench to normal tightness filter flask and filter cover should have 1-2 mm cap. Package Includes: 1x Housing Wrench Specifications: Material: PP Length: 25cm/9.84in note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.