Features: The ceiling leveling sleeve is from good quality materials precise, ensuring stable and reliable installation. Wall thickness is 1.5mm, and the internal hexagonals stamping technology ensures that the sleeve is thickened and not easily deformed,more precise leveling of the ceiling, and adjust positioning width at will; Hightemperature quenching process, rustproof, highhardness, strong toughness, and hardened treatments. Suitable for professional and DIY enthusiasts who require ceiling leveling, such as architects, decorations Widely used for the ceiling leveling engineering of various buildings such as residential, commercial and office space hotel, etc., to ensure that the ceiling is flat and beautiful. Specifications: Material: ChromePlated Iron Socket Size: about 10x170mm/0.39x6.69in 12x170mm/0.47x6.69in 13x170mm/0.51x6.69in 14x170mm/ 0.55x6.69in 14x330mm/0.55x13in 17x170mm/0.07x6.69in Package Includes: 1PC note: Please allow 1-2cm errors due to manual measurement, please make sure that do not mind before order. Due to the differences between different monitors, the picture may not reflect the actual color