Having a formlabs 2 and cutomers having problems casting the resin I decided to make my own moulds to save time and offer a service, also included is a bangle mould, any tolerance are for my machine not tested on any other. I also surgest sealing base with tape or putty to stop silicone leakingthe sprue is 5.5mm tube for ring mouldI have used this but had to reprint the wall for next use so will try to improve on this design