Lightspeed ships with 4g weights, but you can't physically put them in the mouse. : r/G502MasterRace
Logitech G502 Hero review: Faster, stronger, but it is better? | Rock Paper Shotgun
Logitech G502 HERO Review - RTINGS.com
Amazon.com: Logitech G502 Lightspeed Wireless Gaming Mouse, 25K Hero Gaming Sensor, 25600 DPI, RGB, Ultra-Light, 11 Programmable Buttons, Long Life Battery, PowerPlay-Compatible, PC - Black : Video Games
For Logitech G502 Proteus Core & RGB Mouse Balance Tuning with 3.6g Weights 5pcs 603922688365 | eBay
Amazon.com: Logitech G502 Hero K/DA High Performance Wired Gaming Mouse, Hero 25K, LIGHTSYNC RGB, Adjustable Weights, 11 Programmable Buttons, On-Board Memory, Official League of Legends Gaming Gear - White : Video Games
Logitech G502 LIGHTSPEED Wireless Gaming Mouse
Logitech G502 Hero & Lightspeed Review
Logitech's G502 Lightspeed is a wireless version of the fan-favorite gaming mouse - The Verge
Extra Weights for Logitech G502 (910005565) Wireless Gaming Mouse | eBay