The Brey Krause Model R-9530 Quick Release Fire Extinguisher Mount (R-9530) is designed for use with extinguishers with a 90mm diameter, such as the SPA 0.9 AFFF Extinguisher. The precision machined bracket allows quick and easy removal of the fire extinguisher. Mounts with 4 bolts to any surface, or an existing Brey Krause fire extinguisher bracket.