The Isokern 225mm internal diameter support block provides a secure base for small open-fire pumice liner systems.

This support block facilitates perfect transition from flue pipe to chimney liner with stainless steel adapters. Masonry void sizing allows minimum 15mm LECA insulation by builder using brickwork or blockwork. Pumice offers high insulation lightweight installation and enduring reliability.

• Internal diameter: 225mm
• Height: 75mm
• Material: Volcanic pumice concrete
• Compliance: CE certified to EN 1857