Pipe Stretcher Kit 1-5/8" to 4-1/4" 1-5/8" to 4-1/4" & Hydraulic System & 10 T The exhaust pipe expander stretcher tool set is convenient. A 10-ton air hydraulic foot pump with 6 feet hose makes pipe expansion work effortless. Collet sets expand pipes from 1-5/18" to 4-1/4", so they can be used on most vehicles. Wide Expanding Range Labor-saving Hydraulic System Easy to Install & Operate Heavy-duty Construction Convenient Storage Key Features Wide Expanding Range: The hydraulic exhaust pipe expander provides various collets for a broad expansion range from 1-5/8" to 4-1/4". Includes: mild steel expander (1 5/8" - 1 7/8" collet, 2" - 2 1/2" chuck), and aluminum alloy expander (2 3/8"- 2 3/4" Collet, 2 3/4" - 3 1/8" collet, 3 1/8" - 3 1/2" collet, 3 1/2" - 3 7/8" collet, 3 7/8" - 4 1/4" collet). Labor-saving Hydraulic System:This muffler pipe expander forces pipes to expand by using an air hydraulic mechanism. A 10-ton air hydraulic foot pump with a 6 feet high-pressure hose makes your