SELECT FINS - PROGRESSION 34 MC POWER BOXNeed a size or box type we do not have in stock? We can order from Select Fins and, depending on the season, get fins relatively quickly. Write to us at info@windforce. ca or call 1 (514) 504 5925 Multiconic (with Power Box Tuttle Box Trim Box adaptor). Easy and solid fin thanks to the Fr4. c material. An ideal concept to begin and make progress. Double curved fin with and unbeatable value for money.