Features 1、Professional and technical rail and block, strong and durable. 2、Adopting 4‑point contact design, it can bear load from every direction, and has good strength and high accuracy. 3、Designed with ball retainer, which allows interchangeability in the case of small precision. 4、Block has lubrication system, lubrication oil can be easily put into the oil inlet on the side. 5、Tiny and light weight, suitable for most automatic equipment. Specification Features: Professional and technical rail and block, strong and durable. Adopting 4-point contact design, it can bear load from every direction, and has good strength and high accuracy. Designed with ball retainer, which allows interchangeability in the case of small precision. Block has lubrication system, lubrication oil can be easily put into the oil inlet on the side. Tiny and light weight, suitable for most automatic equipment. Specification: Rail Model: MGN9B Type: Slide Rail Slide Track: Linear Rail Rail Length: 300mm/11.8inch Rail Width: 9mm/0.4inch Material: Bearing steel Number of slider: 2 Sliding Block Model: MGN9B Sliding Block Fixed Mode: Locking type Weight: Approx. 145g / 5.1oz Package List: 1 x MGN9B Linear Guide Rail 2 x MGN9B Linear Guide Block Package List