100% Guarantee - convenient, affordable and easy! Otherwise a random one will be sent. The AMP Corner has 90 degree.Two screw holes distance (from center to center)is about 35mm. Please check the screws distance carefully to confirm the item will fit your Amplifier. Can protect your amplifier from damage. The item "NEW 8pcs Black Hard Steel Guitar Amp Amplifier Speaker Corners Cabinet Protect" is in sale since Friday, December 8, 2017. This item is in the category "Musical Instruments\Pro Audio\Parts & Accessories". The seller is "ktstoregroup" and is located in Hong Kong. This item can be shipped worldwide.