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MasterSlim is distinguished by a minimalist design and very narrow profiles, while maintaining good thermal insulation parameters. Its appearance resembles narrow profiles of steel frames. It is a system perfectly suited for renovation, as it allows to maintain the original appearance of facades, but it will also work well in new construction projects.


  • ultralight multi-chamber system, 
  • construction depth: 75.9 mm
  • glazing - frame and sash up to 46 mm,
  • maximum leaf dimensions - width: 1700 mm or height: 2800 mm,
  • high resistance to weather conditions,
  • also available in a high insulation (HI) version for all construction variants,
  • the possibility of using anti-burglary solutions up to the RC2 class,
  • NEW: Black Sobinco multi-point locking as standard.

Construction depth 75,9 mm

Multi-chamber system

Glazing package Ug=1,1


Fittings Sobinco

*for reference window 1230x1480mm

For more information, to request an estimate or design consultation, please submit the form below

ESF Windows

44 Buck Shoals Rd, Ste I03, Arden, NC 28704

Toll Free:877-467-8335 Local:828-209-0377

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