Filament Spool Bushing

I didn't like the amount of free play in my spools while printing so I made this simple bushing to keep it true and will hold better tension on filament as it feeds. I use this in conjunction with the std filament guide loop and my own design feed roller. Fits all 1KG filament spools I have bought so far.

Dimensions
I.D. 28.5mm
O.D. 50mm
O.A.L. 90mm
Flange height 10mm