4T811W | Wavin Osma SquareLine 100mm External Stop End (WhiThis external stopend fits over the end of a 100mm SquareLine gutter to effectively seal the system from the outside. Used to terminate a run of guttering, it ensures a watertight seal and integrates seamlessly with the Wavin Osma SquareLine system for domestic applications.

• Caps the open end of square guttering from the outside
• Simple clip-on installation with watertight retained seal
• Designed to accommodate thermal expansion
• UV-stabilised white PVC-U for long-term performance
• Compatible with all 100mm Osma SquareLine fittings