It is stainless steel 304 material, which is anti-rust. PVD is another color option. You may contact us by below form to send your request if you need a different color. 

Not a problem for us to supply extra screws, even you want to change the size of screws. Just feel free to let us know your request, thanks. 

You can email us with your drawing of flush door hinge, our team will come back to you when discussing with our engineer team. 

It depends on your actual requirement, we will need your drawing and check with our current molds to see if we can do directly without extra cost increased on the tooling. 

Standard butt hinge should be used only on residential and light-duty commercial applications. Heavy duty ball bearing door hinges are the best option for an entrance door and commercial applications, and even fire doors. 

For flush door hinge HH0016, we currently just have one size at 100MM. 

Yes, our flush door hinge HH0016 is with the function of self closing. 

The hinges can be upside down itself when putting it to the doors, no matter the door is left hand or right hand. 

No, the structure of flush door hinge same as ball bearing hinges. 

Normal white box, color box, single blister and double blister package are available currently.