This is a VINTAGE piece of CAMERA EQUIPMENT. It is EXTENSION-BELLOWS for MINOLTA -SR. It is in it's original box which the top of the box is torn and worn. Each end has the crease torn to the top. The bottom of the box has a small tear in two end corners. Please look closely at the pictures. I am not sure if this was ever used. It could have been and then put back in the plastic. I took it out of the plastic just to take the photos for this auction.  It is wrapped in plastic now the way it has been since 1978 in a closet. This is from a non smoking home. I do not know if this has ever been used. I am sure any PHOTOGRAPHER would know how to use this. This is a great piece that is VINTAGE CAMERA EQUIPMENT.