VTG PRO Automatic Extension Tube Set for Pentax Praktica Yashica Edixa Mamiya

Vintage PRO Automatic Extension Tube Set for Pentax Praktica Yashica Edixa Mamiya Photographic Equipment New old stock in original opened damaged box. I do not see a model number or measurements on box or instructions, so I've included some diameter measurements in photos. If you need any further measurements dont hesitate to inbox me. Thanks for looking!