Description:1. Good Durability: Professional technical guide rail and slider, sturdy and durable.2. High Precision: High precision and stable performance,it can work smoothly.3. Smooth Movement: The slider can be moved easily for ease of use.4. Warm Reminder: The package does not contain prints, please wear gloves before installation to avoid touching the guide rail with your hands and making it rusted.5. No Prints: If you need a print download URL, please contact customer service.Specifications:Applicable to: for PRUSA MK3SPacking List:2*MGN12H Linear Guide 330mm3*MGN12 Linear Sliding Guide Block(2 x Long and 1 x Short)4*T-type Nut 8mm2*M3 Lock Nut1 Small Bag of Spare M3 ScrewsGlove*2Note:1. The delivery does not include printouts (if you need printout download URL, please contact customer service).2. Due to the lighting effects and shooting angles, there is color difference in the product, please understand.3. Due to manual measurement, there is a tolerance in the product size.