https://www.jpcorry.com/jp-corry-products/rockwool-sp-l-fixing-brackets/
Rockwool SP & L Fixing Brackets
Description
Rockwool Firestop Fixing Brackets Are Bracket Clips That Are Bent To An L Shape. The Leg With The Angled Point Being Approximately 300Mm Long, This Leg Is Then Impaled Into The Base Of The Fire Stop. Robust L Shape Design Can Be Used In Cavities Of Up To 400Mm.