When it comes to performance and build size, you will be hard pressed to find a better deal than the Tevo Black Widow 3D Printer Kit. This 3D Printer kit boasts a large print area coming in at 370 x 250 x 300mm (14.6 x 9.8 x 11.8in). It is the big brother to the critically acclaimed Tevo Tarantula. This kit comes with the option of an auto bed leveling sensor, the BLTouch. The BLTouch one of the best auto bed leveling sensors available on the market. It is one of the best upgrades you can make to the already amazing Tevo Black Widow kit.