This is a Fiber optic adjustable sight set for the Sig P220, P225, P226, P228 and P320. Rear is Green and the front is Red. Additional Fiber tubes and wrenches are included in the package. These are LPA brand sights that come from Italy, they are top quality. The rear sight is fully adjustable, for elevation and windage, so you may adjust it in any way for your liking to correct your pistols point of impact. The sight set is made of steel construction, Not Plastic. These sights use the original dovetails/slots on the pistol slide. These are the best sights on the market today to improve your pistols sighting. LPA Part Number TTF28SS.