1st Step: Check the model number of your current case under the blade (CE0536 or CE0523) 2nd Step: Choose the model that suits you. DID YOU KNOW The model of the HU83 or VA2 blade (with or without groove) does not matter if you plan to replace it with your own. 3rd Step: Order the model that suits you suitable, once received nothing could be simpler You will need a pin punch or a hammer and nail. Follow our assembly video to replace your old case with the new one and youre done Ideal product to replace a broken/worn case, or with damaged buttons. Electronic circuit and battery not supplied (they are to be recovered from your old box) Product Notes: Please allow a little manual errors.Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please confirm acceptance before ordering. About Shipping: Please ensure your shipping informations are correct to avoid delivery issues. All orders are shipped within 3 days after payment. Delivery usually takes 8–12 days, The specific delivery time is depend on circumstances. If you have any questions during your purchase, feel free to contact us. We will respond you within 24 hours.