Lindab Magestic Galvanised Steel Gutter 210mm Flex-Fit Rafter Bracket 125mm

Fix 125 mm half round gutters direct to the rafters with the Lindab Magestic Galvanised 210 mm Flex-Fit Rafter Bracket (K21125MG). Engineered from solid 5 mm steel, this compact arm delivers confident support where fascia boards aren’t used—or whenever you want a cleaner eaves line. Flexible clips snap the gutter securely into place for a fast, tidy install, while four fixing holes give a positive anchor into the rafter. For best performance, set brackets at ~600 mm centres and build in a 10 mm fall per 3 m to keep water moving. Need to follow a roof pitch or fine-tune the fall? The K21 can be cold-formed with the Lindab KBO bracket bender for precise angle setting. Finished in Lindab’s Magestic zinc–magnesium galvanised steel, the bracket resists red rust and white staining—even on exposed or coastal sites—and weathers naturally to a smart dark-grey patina that complements both heritage masonry and contemporary cladding.

Technical Specification

• Assembly Video
• PDFs: Assembly Instructions | Technical Details
• Brand: Lindab
• Range: Magestic (Half Round)
• Product Type: Flex-Fit Rafter Bracket
• Model/SKU: K21125MG
• Finish/Colour: Magestic Galvanised (unpainted)
• Material: 5 mm galvanised steel with zinc–magnesium corrosion protection
• Arm Length: 210 mm
• Size Compatibility: 125 mm Lindab half round steel gutter
• Fixing: 4 rafter fixing holes; direct-to-rafter installation
• Retention: Flexible clip system holds gutter securely; snap-in fit
• Installation/Spacing: Recommend 600 mm centres; create 10 mm fall per 3 m run
• Adjustability: Bend to required angle using KBO bracket bender
• Key Features: Compact heavy-duty support; clean eaves line; high corrosion resistance; recyclable steel; ages to dark-grey patina (3–5 years)
• Warranty: 10 Year (Magestic)
• Manufacturer: Lindab