RT DC 4875 NC38 Size: 4.875" OD x 2.250" ID, NC38 (slick) SpecSheet
RT DC 4125 NC31 Size: 4.125" OD x 2.000" ID, NC31 (slick) SpecSheet
RT DC 3500 NC26 Size: 3.500" OD x 1.500" ID, NC26 (spiral) SpecSheet
Product category: 
Drillcollars