Silica Gel Canister (30mm for filament reels)

Yet another container for silica gel pellets, but I made this an optimum size to fit inside filament spools and boxes.

I found some other containers too big to fit inside the centre of some of my filament spools, so I made this one that should fit nearly all spools.

I measured about 8 different spools and found one had a centre hole of only 31mm. So this canister is 30mm in diameter to fit inside these spools. Also, some spools have a wider outer diameter and are therefore narrower. The h