This listing is for an idler pulley for GT2 (aka 2GT) 6mm wide belt for 3d printers, robots, and such mechanical masterpieces, I have both toothed and untoothed varieties available, you choose from the below…
These are idler pulleys, that means they are not driven, they spin freely on their axel, if you want to pull a belt then you need a drive pulley.
People describe this differently, for searchers: 2GT-6mm, GT2-6mm, 6mm-GT2, 6mm-2GT
Like all my products, it's already here in New Zealand, so save yourself a few weeks of waiting for stuff from China by buying from me.
2GT belt has a pitch of 2mm, and these pulleys are for 6mm wide belt and suit a shaft of 5mm.