BF 250 The BF 250 is supplied with a special chuck, type SPV 12-3/8, to create a quick connect and disconnect system for an STR vertical support rod. This can simply be plugged into the chuck and tightened by hand with a half turn of the milled cap nut. The chuck SPV 12-3/8 is also available separately for the purpose of updating older equipment. It can be screwed on with a open-ended wrench.

Diameter: 250 mm, height (without the SPV): 38 mm Surface finish: black textured varnish