Helium-Neon laser- (specs: TBC) manufactured by Siemens as used in the Philips laservision (laserdisc player) VLP-700 model number: LG2628 inside 255 x 38mm diameter steel tube , overall length inc lens : 265mm 2 x silicon leads terminated in female spade connectors. status: *****SECOND USER ITEM ************* circa: 1982 still fires up instantly and fully tested. Will also be tested prior to despatch. *********** WARNING - LASERS ARE DANGEROUS... ************ ********* USE EYE PROTECTION AT ALL TIMES DESIGNED FOR THIS WAVELENGTH *************** ********* THIS IS A PIECE OF LABORATORY EQUIPMENT NOT A TOY **********