Specifications:Size: 300mm x300mmColor: BlueBackground is made of 3M adhesive , easily stick on the heat bed platform HOW TO USE:There are 2 methods to attaching the build surface on heatbed:1. Clamp the build surface to the print bed using binder clips(at least 3 clips)2. Torn off 3M tape on back and stick it on heatbed. Package Included:1x Creality 3D® 300x300mm Heated Bed Sheet