The OMP One collection is the top of the range models of extinguishers manufactured by OMP. These extinguishers are produced to 8865-2015 homologation requirements and are on the Technical List 52. OMP One collection extinguishers are mandatory for GT3 and WRC, however they are recommended for most circuit racing categories.
Currently there are two models available in this range. The CESAL4S provides 1.2 - 2.2 cubed metres of extinguishant where as the CESAL4L provides 1.99 - 3.73 cubed metres.