SBC Linear Rail System - SBI 20 SL referenced Ball bearing product produced by high technology. SBI 20 SL is the result of a far more developed technology compared to similar regular products. All of the listed products are with guaranteed origin and high quality. Our company can make an offer even if we do not distributor of United States. SBI 20 SL referenced product is an original piece of your foundation or machine, original parts makes your machine live longer.