Night Fision utilizes an injection molded process and military-grade polymer with durable polymer tritium outlines to give you flexibility and unrivaled daytime visibility. The night sight set is a square front green tritium with a yellow outline, square rear green tritium with a white outline. Compatible with Glock models 42/43/43X. Front Sight Width: 0.140". Front Sight Height: 0.213". Rear Sight Height: 0.240".