The Chimera Speedring 410mm is needed to attach Chimera Softboxes on the Arri Lampheads running with 4kw / Arri M40.
Chimera Quarzbank M Plus 90x120 for Arri
Chimera Quarzbank L Plus 135x180 for ARRI
Arri HMI M40/25 Set 4kW
Arri HMI M40/25 Set 2,5kW
Arri HMI D40 Fresnel 4kW
Chimera Speedring 345mm 2,5kW/M18/T5
Chimera Speedring 230mm Arri 1,2kw/2kw