This kit includes everything you need to replace the inner tubes in your tubeless ready rims and tyres with genuine Stan’s sealant--the original, and still the best tubeless tyre sealant. All Mountain Bike Tubeless Kits include 200ml of sealant, 44mm brass valves, and Stan’s Yellow Tape. Kits are offered in different tape widths to fit a variety of rims. If you're unsure whether your rims are tubeless-ready, look for graphics that mention it directly on the wheel or contact the manufacturer for details. Do not attempt to use a tubeless system on wheels that are not explicitly tubeless compatible.Key Features:Everything you need to quickly and easily complete your conversion to tubelessStan’s Sealant seals punctures up to 6.5mm (1/4") quickly and offers long-lasting protection44mm brass valves feature removable valve core for easy sealant refresh and fit most mountain rimsYellow Tape helps seal spoke holes airtight and does not allow liquid to pass, keeping the rim interior dry200ml of sealant provides enough liquid to seal two 29” wheels with larger volume tyres.How to choose your size:The Stans NoTubes MTB tubeless conversion kit is available in four different tape widths and two valve lengths. When selecting size the first number shown is valve length and the second number is rim tape width. Valve Length / Rim Tape WidthChoose rim tape width that most closely matches the internal width of your MTB rims: 21mm, 25mm, 27mm or 30mm.Choose whether you want a regular 35mm or long 44mm valve length. If you rim is deeper than average choose the 44mm valve length.