This product is made of high quality material. It comes with general standard inch thread, suitable for most telescopes.Easy to install and use, a good choice for you.Features:Made of high quality aluminum alloy and optical glass, this product is sturdy and durable.It can reduce eye strain and improve contrast and surface detail of the planet.Comes with general standard inch thread, suitable for most telescopes.Suitable for enhanced views of the Moon, Jupiter, Mars, Saturn, star cluster, nebula, deep sky, etc. (Red/Yellow/Blue/Green nebula filters can not be used to observe the sun.)Easy to install and use, a great choice for astronomical telescope lovers.Specifications:Condition: 100% Brand NewItem Type: Telescope Lens FilterMaterial: Optical Glass + Aluminium AlloyColor: Red/Yellow/Blue/Green/BlackTransmittance: 83%Thread: Inch Thread (Fine Thread)Size: Approx. 31.7mm / 1.25inchWeight: Approx. 46g / 1.6ozPackage List:5 * Telescope Lens FilterNote:1. Black filter is used as a solar filter. Don't use it when the sun is particularly strong.2. Red/Yellow/Blue/Green nebula filters can not be used to observe the sun.