Ecoguard Dust Collection Cover Type G. Fits on most popular high-speed angle grinders. Removable flat covers allows grinding to the edge. Suspended dust cover prevents dust from escaping. Alpha® introduces a new Ecoguard designed for collecting dust when using the Alpha® HSG-125 or other High-Speed Angle Grinder. The Ecoguard Type G is intended for use when grinding with wheels up to 5” in diameter. It is made of high-quality construction for heavy-duty applications. This dust collection cover creates a virtually dust-free environment when connected to a vacuum.