Summary

These are printed with UV-resistant ASA, which is meant for outdoor use.
These hooks are sold as is.. I provide no warranty for it.
As far as I know, they only fit these HDB gates.
The original design needs a lot of force to fit it in, and you have to break it if you want to remove it, I have since loosened it a bit, so it needs less force to install and can be removed a bit of force.
Please pick it up from Yishun or Marina Square or pay $3 for postage.
Just so you know, the hook snaps into a bar measuring 46mm.