The Defender is a highly durable and multifunctional flip cap, making it the perfect choice for any situation. It is designed to fit Vortex scopes with a 44mm objective lens and has a stainless steel spring for easy flipping at various positions. It is compatible with PST-3158, PST-3155, PST-3151, VHS-4305-LR, VHS-4302, VHS-4303, VHS-4304, VHS-4305, VHS-4308, VHS-4309, DBK-10019, DBK-10015, CF2-31013, CF2-31015, CF2-31029, CF2-31031, CF2-31033, and CPH-412 models. This product is proudly made in the USA.