Quality Snapframe with mitred corners, 25mm profile available in the following colours/sizes:
Silver Anodised: A4, A3, A2, A1, 20″ x 30″
Black: A4, A3, A2, A1, 20″ x 30″
White: A4, A3, A2, A1, 20″ x 30″

Also available with round corners on the following:
Silver Anodised with Chrome Corners: A4, A3, A2, A1, 20″ x 30″, A0, 30″ x 40″, 40″ x 60″