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| Blade Type | Vented |
| Dive Type | Scuba Technical |
| Fin Heel Type | Open Heel |
| Lengde | 57.0 cm |
| Strap Type | Spring |
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The RK3 HD is the next fin in the RK3 range of fins. The RK3 HD is made from a higher density material than the standard RK3, which makes the fin stiffer and heavier. The RK3 HD was developed in response to feedback from divers who prefer a heavier fin. The new compound of the RK3 HD adds weight to make it more negatively buoyant than the standard RK3. An ideal fin for dry suit diving. Based on one of the first vented rubber fins sold in North America and popular among military and professional divers. Compact, and ultra-rugged for use in harsh environments. Improved foot pocket with spring straps for ease of use with cold hands or thick gloves. The design has been the standard gear issue fin for military, special ops, coast guard and public safety divers for decades. Short wide blade provides maximum forward thrust while maintaining great manoeuvrability. Vented blade design reduces resistance on the upstroke and enhances thrust on the downstroke. The vents also eliminate vortexes that can occur along the back of the blade much in the same way split fins eliminate the vortex. The blade material designed to hold up in the toughest environments, temperatures and abuse. Two large grommet holes designed to fit most karabiners for easy storage of the fins while accessing the dive site. Spring straps as standard. Custom designed buckle holds spring straps in optimum position. Medium 1.1Kg per fin Blade 49cm Foot depth 22cm Foot width 9cm Large 1.4Kg per fin Blade 54.5cm Foot depth 25.5cm Foot width 9.5cm Super 1.44Kg per fin Blade 57cm Foot depth 27cm Foot width 10cm
