This is the C4 400 Plastic Line Dolphin Fin Long Blade Spearfishing FinsFeatures: MATERIAL: High module plastic Black BLADE DIMENSION: 814 x 192 mm BLADE HARDNESS: medium WATER RAILS: - FINS ANGLE: 29Adeg + 3Adeg= 32Adeg ENDING BLADE: concave FINS WEIGHT: Starting from 700 gr. FOOT POCKET: Mod. 400 - Color black FOOT POCKET WEIGHT: 390 gr. In size 42/43 FOOT POCKETS SIZES: European sizes: 38/39 - 40/41 - 42/43 - 44/45 - 46/47 US/Canada sizes: 5.5/6 - 7/8 - 8.5/9 - 10/11 - 11.5/12.5 Dolphin are C4&';s new entry level plastic blade fins. They are simple and efficient. They are comfortable as well as super versatile. They combine the advantages of comfort and ease of wearing of the 400 ultralight foot pocket with a mountable plastic blade. This is the best choice for entry level divers.