37g
Synchronous Wheel 20 Tooth 8mm Aluminum Bore Pulley 16mm Strap Width
It’s an unbranded generic unit, so you can replace it without worrying about matching brands.
Aluminum 20 Teeth 8mm Bore 5mm Pitch Timing Belt Pulley for 15mm Belt
What stands out with the TVEX01GK-LXC is the easy access to internal parts.