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DIY Toilet Repair:Swap out your old worn diaphragm washer within minutes to eliminate leaks permanently. No professional plumber needed. Easy Installation:Simply shut off the water supply, remove the valve cap, align the notches, fit the new washer and reassemble. Straightforward repair suitable for everyone. Sealing Performance:Made of flexible high-grade rubber and sturdy plastic. Creates a tight dependable seal resistant to abrasion, cracking and limescale accumulation. Universal 27mm Size:Engineered to match most standard toilet cistern fill valves. Skip expensive full valve replacements; only change the washer to cut costs and save time. Package Contents:You will receive 4 diaphragm washers.