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 or Yellow or Blue or 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 percent Brand NewItem Type: Telescope Lens FilterMaterial: Optical Glass and Aluminium AlloyColor: Red or Yellow or Blue or Green or BlackTransmittance: 83 percent Thread: Inch Thread (Fine Thread)Size: Approx. 31.7mm or 1.25inchWeight: Approx. 46g or 1.6ozPackage List:5 x Telescope Lens FilterNote:1. Black filter is used as a solar filter. Don't use it when the sun is particularly strong.2. Red or Yellow or Blue or Green nebula filters can not be used to observe the sun.