Sizes are exact match for canon F1 F1N. These kits are readymade, you don't have to do anything in it(all cuts are already made in it). Cotton swab x1. Even if you fail to install the first or second kit, we strongly believe in the third kit must be able to install successfully.

Brand: eTone
Type: Light Seal Kit
Compatible Brand: For Canon
Compatible Camera Type: Digital SLR, Medium Format
Compatible Model: Canon F-1
Country/Region of Manufacture: China