MBP Alloy Tubeless 40mm Bicycle Presta Valve Stems Fits Most Rims with 2 Types of Grommets Included for Each stem.

Stan's Tire Sealant will stay liquid in a mountain bike tire with a thin casing for two to seven months on average. Riding in arid climates or storing the bike in a hot area will require more frequent monitoring of sealant levels. Special anti-freeze agent.

The world’s first tubeless sealant and the first choice of riders today
Recommended for all-around use, compatible with all tubeless road, gravel, and mountain bike tires
Seals punctures up to 6.5mm (¼”)
Compatible with valve installation using Stan’s Tubeless Sealant Injector
Remains liquid inside tires for 2-7 months for long-lasting protection)
The world’s first tubeless sealant and the first choice of riders today
Recommended for all-around use, compatible with all tubeless road, gravel, and mountain bike tires
Seals punctures up to 6.5mm (¼”)
Compatible with valve installation using Stan’s Tubeless Sealant Injector
Remains liquid inside tires for 2-7 months for long-lasting protection)

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