This professional-grade 4-inch inflatable pipe test plug comes with a 39.37-inch quick-install extension hose, making it an essential tool for plumbing maintenance and inspection. Crafted from 4.5mm thickened natural rubber, this durable test plug measures approximately 4 x 5.9 inches and demonstrates excellent expansion capabilities while maintaining its shape through repeated use. The kit includes the test plug, extension hose. The innovative double pull ring design allows for effortless removal, while the skirt belt and pure copper valves ensure reliable sealing during operation. For optimal performance, use only with a manual pump at a maximum working pressure of 5PSI. The plug efficiently navigates through test tees, sanitary tees, and floor drains. When not in use, store in a cool, dry place - a light coating of talcum powder and sealed plastic bag storage will help maintain its condition. Remember to verify pipe size and ensure clean, burr-free surfaces before installation for optimal sealing.