MG325DT Open loop galvo by GSI (General Scanning Inc.) As used in high end graphics and metrology laser scanners. Download GSI G-Series .pdf datasheet (does not inc. 325) : Status: NOS (New Old Stock) totally unused with original plastic protection plate still taped in place (see second photo of spindle shot) these sell for $399 (used) = £263 buy this new un-used one for £250 RoHS: not known.