Streamline your Gimbal Service and maintenance with the New Signature Stainless Steel Swivel Shaft Cover Plate. Crafted with super high quality stainless steel, this plate includes a high-performance Mercury Level Quality gasket for a tight seal. The 4 included Bolts are 1/4-28 stainless steel button head bolts. This Kit is Compatible with Bravo 1, Bravo 2, Bravo 3, and Alpha 1 Gen 2 models, This cover plate will make your job easier.