Features:Support accurate TTL & Autofocus.Built-in electric pins.Combined with 3 tubes in different length: 12mm， 20mm， 36mm.Made of high-quality ABS that is more strong.Upgraded circuitry to work better with digital SLRs cameras and SLR lenses.Superior lock pin which can tighten the tube joint.Perfect for macro shooting.High quality and compact.Specifications:Compatibility: for most Nikon lenses and Nikon DSLRS (such as Nikon D7100， D5300， D5200， D3200， D800， D800E， D5100， D7000， D3100， D300S， D5000， D700， D300， etc.)Material: ABS， PCColor: BlackMacro tube size: 6.9 * 8.9cm / 2.7 * 3.5in (D * H)Macro tube weight: 188g / 6.6ozPackage size: 13 * 7 * 7cm / 5.1 * 2.8 * 2.8inPackage weight: 222g / 7.8oz Package List:1 * Macro Extension Tube Set1 * Bag1 * User Manual (English)(Cameras and other accessories are not included)