This Hasselblad Variable Extension Tube 63.5 to 86mm (Part Number 51691) is in excellent condition overall. Designed to be multiple extension tubes in one. The scale printed on its side represents a single extension tube in 1mm increments. This tube can be used in combination with other extension tubes or bellows. It can be used with any Hasselblad Len in the Hasselblad Compendium, but is optimized for use with the 135mm Makro-Planar CF f5.6. Cosmetics are excellent and it is working properly.