- Brand: GULL - Model: Gulls Skin - Type: Carbon Fin Soft+ - Color: Black - Size: 25.5 to 28.0 cm Thank you for viewing. This is a Gulls Skin that my husband used for free diving. According to my husband, he was able to go to a depth of 60 meters using these. The retail price was 70,000 yen. As you can see in the photos, they are covered in scratches, so they are recommended for those who want to try carbon long fins. Please understand that this is a used item, so no returns, refunds, or exchanges (3N).