A common problem with some older style film developing tanks (like Jobo 2000 series or Plastimat) is that the retaining clip eventually breaks, a part which is supposed to keep the film spirals from sliding upwards during agitation. It seems that these retaine are no longer available, which makes these tanks difficult to use once the clip is gone, even though the tanks are otherwise almost unbreakable and will last for many more yea. So I designed this replacement part. I recommend to print it in PETG as it is flexible and can withstand the chemicals without any issues. Do not use PLA, it will deteriorate very quickly and only last 1-2 times before breaking apart. THIS ITEM HAS BEEN TESTED AND FOUND FULLY FUNCTIONAL. CREATING AND FINALIZING IT HAS TAKEN HOU OF DESIGNING, MODIFICATIO AND SEVERAL TEST PRINTS TO GET EVERYTHING RIGHT. PLEASE COIDER LEAVING A TIP VIA PAYPAL IF YOU FIND THIS ITEM USEFUL: e-mat-paypal(a)