Size:400mm Type:HGR20 Material:carbon steel & bearing steel Be used for CNC machine , electronic machine,industrial needs , ect. Package includes :400mm HGR20 Linear Slide Rail with 4 pcs HGH20CA Block
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzes reviews to verify trustworthiness.