Upgrading your crystal from stock Hardlex glass to a premium Sapphire Crystal is a great first mod for your SKX007 or Seiko 5 Sports SRPD, especially if you intend to pair it with one of our sloped inserts. This NMK301 SKX Double Domed Sapphire Crystal is designed to have a small beveled edge which looks great with both sloped and flat inserts. The double-dome design of the sapphire crystal ensures that your watch dial is visible at any angle with no distortion. It also has the added benefit of looking really, really cool. Our double-domed sapphire crystals have Anti-Reflective (AR) coating at the bottom side of the crystal. The AR coating comes in two colours - Blue and Clear AR. Compatible with SKX007, SKX009, SKX011, SKX171, SKX173, SKX175 and Seiko 5 Sports SRPD Range. Fits all our SKX Ceramic and Aluminium Sloped and Flat Inserts. Also compatible with new SRPD Collection 5 Sports collection – SRPD55K3, SRPD57K1, SRPD59K1, SRPD55K1, SRPD55K3, SRPD57K1, SRPD59K1, SRPD61K1, SRPD63K1, SRPD65K1, and SRPD65K4 5 Suits collection – SRPD65K2, SRPD67K1, SRPD69K1, SRPD71K1, SRPD71K2, SRPD73K1, SRPD73K2, and SRPD75K1 5 Specialists collection – SRPD55K2, SRPD65K3, and SRPD76K1 5 Street collection – SRPD79K1, SRPD81K1, and SRPD83K1 5 Sense collection – SRPD77K and SRPD85K1