DescriptionProperties: Class A1 fire-rated 0.9mm. Spot welded. Everbuild Fire Mate intumescent and acoustic sealant used on all gaps.Rectangle to Round Duct 218 x 136 x 50mmFree area = 11,700mm2Connects to double size cast iron air bricks to convert rectangular to 125mm diameter , can be used with round adapter 5to4 to reduce diameter to 100mm.Must be used in conjunction with METIMP6 adapter for the following air bricks …Louvre L6, Y pattern, Y6, GRID6, VV6 and Hit and Miss HM6.The adapter allows full free area use of all our cast iron double sized air bricks with the exception of the MAX6. If used with the MAX6 it will reduce the free area from 18,000mm2 to 11,700mm2No requirement to use METIMP6 adapter with metric air brick WIN6 windsor as it is a snug fit. No requirement to use METIMP6 adapter for the Flyscreen air brick FLY6 but essential to use Duct tape.Adaptor 216mm W by 138mm H by 50mm D, Central located rear spigot 122mm dia 25mm D, Overall length 75mmHand made to order exclusively for Cast Iron Air Brick Company by our dear friends at Rytons Ltd in Kettering, England
