COMPATIBLE WITH for M365 INNER TUBE: the type and size of this 8 1/2x 2 air tire inner tube replacement is perfectly compatible with for m365 tires. it has 2mm thickness which is twice the thickness of the tire and packed 2pcs in a beautiful package, each tire is 125g. straight value stem scooter replacement inner tubes.SUITABLE FOR VARIETIES OF SCOOTERS: Some that have models compatible with this replacement inner tube, like for Razor, Bladez, Gotrax, Crazy Kart, and more. This 8.5 inch x2 inch type inner tube is very suitable for air tire scooters, gas scooters, DIY scooters, bird scooters, mini-bike, and e-bikes.IMPROVED HIGHER QUALITY BUTYL RUBBER: Made of thicker butyl rubber, which is 1mm thickness more than for M365 inner tire. This replacement scooter tire has good resistance to penetration, mineral acids, and aging with high resistance to mineral acids and wear and tear. The butyl rubber ensures incredible resistance to extreme temperatures (-60 Celsius to 180 Celsius). Besides, this replacement inner tube will make you more comfort and safe when you go along an unfelt road.EASY INSTALLATION: It is extremely convenient and simple to install and detach the replacement inner tire, pls make sure the valve of the scooter wheels tires is in the right direction.Colour:blackMaterial:natural rubberPackage Contents:2 * scooter tiresOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.