🚙SIZE: [2-pack] The replacement inner tubes are for 4.10/3.50-4" tires Fits vehicle with 4" rim. Also called 4.10 3.50-4, 4.10/3.50-4, 4.1/3.5 4, 4.10 3.50 4, 410/350-4, 3.5-4 4, 4.10x3.50-4 inch.Please check the size before you buy it. | 🚙HIGH QUALITY: The 4.10/3.50-4" bent mouth lawn mower tire tube is made of isobutylene isoprene and superior quality heavy duty rubber which is better in air tightness and aging resistance.In order to avoid the occurrence of flat , the 4.10/3.50-4" inner tube is uniformly formed by 100% Natural Rubber. Able to achieve efficient use and maximum shock absorption.The rubber wall of the inner tube is thicker than other brands on the market. Please rest assured to use! | 🚙WIDE USAGE : When a 3.5-4 4 inch tire blowout occurs, there is no need to buy a new wheel. Only need to replace the 4.10/3.50-4" tube, you can use it normally! | 🚙PERFECT FOR EQUIPMENT : 410/350-4 tubes fits perfectly as long as your vehicle/equipment uses 10" tires ( outside diameter), 4" rims and 4.10" width.The 4.10/3.50-4" tire inner tubes are usable with garden carts, tractor carts, hand trucks, flat carts , wheelbarrows, mowers etc. ❗NOTE: 30 PSI maximum inflation, Avoid overfilling resulting in flat tires. | 🚙60 DAYS WARRANTY: 2 months warranty! RISK-FREE SHOPPING. Ask us if you have any questions, and we will solve it for you right away. We will stictly carry out the quality-control project,which will enable our customers to buy with confidence and use with satisfaction.