The Chimera Speedring 230mm is needed to attach Chimera Softboxes on Arri HMI Lampheads with 1,2kw or 2kw.
Chimera Quarzbank M Plus 90x120 for Arri
Arri Fresnel T2/2kW
Arri HMI D12 Fresnel 1,2kW
Chimera Speedring 345mm 2,5kW/M18/T5
Chimera Speedring 410mm 4kW / M40 (9365)