1100% and high quality. 2Made of aluminium alloy material with black anodized surface, it is durable. 3This is a single X for linear guide sliding track 4Precision machining and stable performance 5Widely used in production machinery, testing equipment, optical experimental measurement, finetuning displacement, precision positioning, quantitative movement, etc. Features: 1.100% and high quality 2.Made of aluminium alloy material with black anodized surface, it is durable. 3.This is a single X for linear guide sliding track.4.Precision machining and stable performance 5.Widely used in production machinery, testing equipment, optical experimental measurement, fine-tuning displacement, precision positioning, quantitative movement, etc. Specification: Condition: 100% Model:SEMX40-AS Material:Aluminium Alloy(black anodized surface) Table Size: 40*40mm Load Resistance: 19.6N Stroke: 6.5mm Centimeter Card Accuracy: 0.01mm Parallelism: 30um Moving Parallelism: 10um True Straightness: 3um Moving distance adjustment: micrometer differential head Sliding Track: linear guide Rail Type: cross roller type Weight: Approx. 168g / 5.9oz Size: Approx. 62 * 70.65 * 20mm / 2.4 * 2.8 * 0.8in Package List: 1 * Linear Stages Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.