RNA49 ... RS RNA49 ... 2RS single-sided or double-sided seal seal NA69 .. RS NA69..2RS single seal or double sealed double RNAO outer wall single or double row without an inner ring NAO no outer Ribs single or double row with an inner ring outer double-wall single RNAV NAV without inner ring outer double-wall single inner ring KR and KR ... PP curve roller KRV and KRV ... PP curve roller KRV and KRV ... PP type curve rollersKRV, KRV ... PP curve wheel and KR, KR ... PP curve wheel structure the same needle roller bearings K81208 TN, only that they are full of needle roller bearings. They can withstand heavy loads and low speeds. And must often grease. Needle roller bearings needle roller bearings K87408 K89407 TN_ needle roller bearings _ by LINQing municipal governance and needle roller bearings plant. Linqing municipal and needle roller bearings plant (www.zhgzzc.com) (www.zhgzzc.net) strong, credible, in other industries, Liaocheng accumulated a large number of loyal customers. The company better work attitude and constantly improve governance and innovative ideas will lead the needle into the brilliant and you work for a better future!