Just search for: chastity scrotum ball cage or testicle cage
It’s from amazon
ChicLSQ Ventilation Cage, Chastity Belt Set with 4 Cock Rings, Small Chastity Cage, Man Bondage, Extreme for Men, Chastity Cage, Black https://www.amazon.de/dp/B08XJYLK8V/ref=cm_sw_r_apan_glt_i_JNPB4ZYG506TBNHH4HDK
Its from amazon, its better for me bcs I'm uncut so I hope it will keep my skin above the glans. Here is the link for similar cage
ALMYMM Cage Chastity Belt Man Extreme, Chastity Cage Male Cage BDSM Fetish Sex Toy for Couples, Cock Cage Chastity Cage with 4 Rings and Invisible Lock Key (M) https://www.amazon.de/dp/B094RGTTPJ/ref=cm_sw_r_apan_glt_i_QGSF3SE5VN8YACYCRVR3?psc=1
Heres a link to a version of it on Amazon. I have this version myself and its great! For reference i am about 6in erect, and a tiny bit avg on girth, fits great.
Thats the one. Just a cheap amazon cage. Granted it is very comfy for the most part and has worked very well. This is my second cage. I used a cheap CB knockoff from amazon. Which is great for figuring things out but not good for any extended chastity play. Although my wife is wanting to to get me a Holy Trainer to try soon.
It's from Amazon. Here's a link to it here