21 Sport Hydro Flat Bottom Strut Assy PDF Print $24.50 SKU: SPDS-005-F 21 Sport Hydro Flat Bottom Strut Assy. SPDS-005-F Add to Wishlist Add to Compare Back to: Speedmaster & Miscellaneous Hardware Description 21 Sport Hydro Flat Bottom Strut Assy.SPDS-005-F