NOTE: This glass is designed for watches with a flat glass.NOTE: The protective film has been designed for flat surfaces. The specification of the diameter relates to the film - not to the housing. Savvies Xtreme Glass HD33 Clear Tempered Glass Screen Protector for Circular Displays (Diameter: 30 mm) with 9H surface hardness and oleophobic coating provides maximum protection against scratches and abrasion for your device. Rounded edges, a pleasant surface and the extremly high transparency preserve the original usage experience and ease of use of the Circular Displays (Diameter: 30 mm). Precision Cut Maximum protection and a perfect fit for Circular Displays (Diameter: 30 mm). Rounded edges for smooth feel and improvement of gliding and grip experience. Oleophobic Coating Oleophobic coating resists oil and smudges, reduces fingerprints and ensures easy cleaning. High Transparency 94% light penetration ratio preserves crystal clear display clarity and sharpness. 9H Surface Hardness Effectively resists scratches up to 9H. Touchscreen Accuracy High-response: Only 0.33mm thick; maintains the original touch experience. Perfect Adhesion Easy bubble-free installation due to advanced silicon adhesive. Compatible with Circular Displays (Diameter: 30 mm).