Specifications: 4-pieces for pan tilt Color: Black Material: Plastic PT Assembled Weight: 15g/0.5oz (with screws) 2-piece set 9g servos Color Blue Material: Plastic and metal Extra set of generic Horns/arms and Step-by-Step instructions. Please Note: two of these horns/arms will be modified from their generic form during the assembly process. We have assembled this kit many times using this method. We also supply this kit to schools for Maker programs and have had the best success with the included instructions. If you are seeking a fully assembled Kit, please note that this kit requires assembly. We have added a screwdriver and a file to help in the modifications. Assembly of this kit should take no more than 20-45 Minutes. Tool Kit – with PH0 Screwdriver and File board Package list: 1 * pan-tilt platform set 1 * pan-tilt Screw Set 2 * 9 gram Servos 1 * PH0 Screwdriver 1 * File Board Step by step assembly instructions.