UV400 Protection lens 100% harmful UVA & UVB Rays

What's the difference between this and the Foot Activated rack

Seat: Odyssey Monogram

Schrader Valve

SRAM XX T-Type Chainring - 34t TQ Ebike Direct Mount Silver racerback tank top UV400 Protection lens 100% harmfulDesigned specifically for use e mtb drive systems SRAMs XX T Type direct mount rings offer light weight with optimal retention performance needed for e mtb. Steel and Aluminum construction Tooth Count 34 Round or Oval Round Drivetrain Speeds 12 Chainring BCD Direct Mount Material Aluminum Color Silver Designed for ebike Yes Defined Color Silver Motor Type TQ Ebike