Extremely high quality most 3d printed parts are obviously 3d printed and are poorly manufactured, I can assure you these are not! These will fit your discovery 1/2 Secured with doubled sided tape or screws (not included) 3D printed cup holders using Anycubic Kobra S1 Printed in PLA Could take up to 3 days to ship if in demand Made in UK. This is the only listing of this any other with same photos is a direct copy of my product