YUNSHENG API 11B Sucker Rod, grade D, SIZE:5/8", 3/4", 7/8", 1", 1-1/ ... 8", API APPROVAL MANUFACTUER YUNSHENG API 11B Sucker Rod, grade D, SIZE:5/8", 3/4", 7/8", 1", 1-1 ... /8", API APPROVAL MANUFACTUERYantai Yunsheng Grade D sucker rod :Approximate Weight of a 25-Foot Sucker RodAPI Size (Inches)Thread Size ... "28.5888.791.8———— API SPEC 11B Sucker Rod,Grade D