Ulihgtfire Rail Adaptor 20mm/21mm Convert to 10mm/11mm Riser Rail Mount Picatinny/Weaver Mount Rail 4Pcs

20 mm width rail suitable for attaching a flashlight, dot site, scope etc. to your equipments.
It's possible to install it on a 20mm rail easily without any tools needed.
Made with lightweight aluminum precisely , light weight and durability is guaranteed.
Size: 35X30X13 mm ;Weight: Approx 55 g