Thread size: female 1/2-20 RH to 1/2-28 RH male (FT03K), female M13.5x1 LH to 1/2-28 RH male (FT03EL), female M14x1 LH to 1/2-28 RH male (FT03FL), female M14x1 RH to 1/2-28 RH male (FT03F), female M15x1 RH to 1/2-28 RH male (FT03G), female M15x1 LH to 1/2-28 RH male (FT03GL). Custom thread options available upon request. Material: 304 Stainless Steel Precision CNC manufacturing ensures a precise fit and easy installation. Manufactured from high-grade stainless steel. Increased outer thread length ensures secure attachment to accessories. All threads are CNC cut for smooth, easy installation. All adapters are checked with go/no-go thread gauges to confirm threads are correctly cut and sized. Scope of supply: 1 x Stainless Steel Adapter 1/2x28 threads. Thread: 1/2x28 threads. Material: Aluminum Color: Black, Silver, Red, Blue, Purple Note: Light shooting and different displays may cause the color of the item in the picture to be slightly different from the actual product. Package Included: 1x Thread Protector Knurled design for quick, tight, and tool-free use. Small and compact, highly effective. Fits all 1/2x28 threaded barrels.