Nice quality 17mm 1.25" eyepiece from Olivon. The fully multi-coated Plossl lens assembly is of a higher quality than modified achromatic and Kellner eyepieces that you get as standard with some telescopes.
A 17mm focal length is ideal for mid magnification targets such as wide field star clusters and other deep sky targets. This focal length nicely fills the gap between 10mm and 20mm eyepieces you often get as standard
Silver outer barrel, but blackened on the inside to help reduce internal reflection and so increase contrast. Excellent quality build construction, and comes boxed with lens caps to keep the body and optics.