This is a A-404-7539 Inner Tube PN: 404-7539Main Description As Following : A-404-7539 Inner Tube PN: 404-7539 Found in Section & Models : Driveline > Driveline Components, Walterscheid P SERIES: P300, Walterscheid P SERIES: P400, Walterscheid W Series: II, Walterscheid W Series: 220, Walterscheid W Series: 2300, Walterscheid W Series: 2400, Walterscheid W Series: 2500, Driveline > Shafting & Tubing, Walterscheid P SERIES: P300, Walterscheid P SERIES: P400, Walterscheid W Series: 2300, Walterscheid W Series: 2400, Walterscheid W Series: 2500 Associated Items : New Also This is An Aftermarket Product And : Weasler alternative to original part. Dim A (1): 39.5mm / 4.5mm Wall Length: 39 3/8" - 1000 mm