【Heavy Duty Inner Tube】: Made of high quality heavy duty rubber, it offers greater airtightness and resistance to aging. These inner tubes are durable and ideal for home, professional, commercial or industrial use. 【Excellent Compatibility】: Suitable for 4 inch tires. The inner tube is compatible with various equipment such as wheelbarrows, lawnmowers, tractors, garden carts, etc. 【Perfect Fit】: Replacement inner tube for 4.10/3.5-4 inch tires. Replacement inner tubes fit 4"/3.5-4" tires/wheels (10" OD). Also known as 4.10, 3.50-4, 410/350-4, 3.5-4, 4.1/3.5, 4.10, 3.50, 4, 4.10, 3.50-4, 4.10/... 【Note】: Package includes two 10.1/8.9-10.2 cm inner tubes and one standard bent TR87 valve stem. Not for road use. Maximum inflation pressure: 30 psi. Use a hand pump. Inflate to avoid overinflation.