Downhole Drilling supplier Our Replaceable Sleeve Stabilizer consists of an integral mandrel and a sleeve. One mandrel series can be equipped with different sizes of sleeve for several holes sizes. Material: 鈼廇ISI 4145H/4145H MOD 鈼廚on-magnetic Hardfacing: 鈼廐F1000 鈼廐F2000 鈼廐F3000 鈼廐F4000 鈼廐F5000 Bit Size (in)OD (mm)Neck OD(mm)ID (mm)OAL (mm)Connectionswebsite:http://www.welongoiltools.com/downhole-drilling/