Promaster 4173 Speed Ring (speedotron) On Camera Flashes best-quality polypropylene nylon webbing and

best-quality polypropylene nylon webbing and straps

/43m at ISO 100 and 105mm flash coverage

The hot-swap system allows for replacement of the battery closest to the door (battery A) with no interruption to shooting as long as the battery in chamber B has enough power to keep the camera on

Collapse it down all the way

responsive focusing

Promaster 4173 Speed Ring (speedotron) On Camera Flashes best-quality polypropylene nylon webbing andProMaster Softbox Speed Rings are the complete 2 piece set required to mount a ProMaster softbox to your studio flash. The inner ring which attaches to your flash may also be used to mount other speed ring compatible accessories. Fits Speedotron compatible flash heads.