Springs support blocks on padeyes, eyestraps, bases, and traveler cars, and prevent blocks from hitting the deck. A (mm)64 mm B (mm)35 mm Weight (g)21 g   Harken Part No. 1603

Made of durable, flexible PVC, stand-up boots hold blocks up without snagging lines. The 370 fits 75 mm Carbo blocks. A (mm)67 mm B (mm)55 mm Weight (g)30.8 g   Harken Part No. 370

Made of durable, flexible PVC, stand-up boots holdblocks up without snagging lines.The 369 fits 40 mm and 57 mm Carbo and Black Magic® blocks. A (mm)51 mm B (mm)40 mm Weight (g)21.7 g   Harken Part No. 369

Springs support blocks on padeyes, eyestraps, bases, and traveler cars, and prevent blocks from hitting the deck. A (mm)25 mm B (mm)19 mm Weight (g)3.7 g   Harken Part No. 097

Springs support blocks on padeyes, eyestraps, bases, and traveler cars, and prevent blocks from hitting the deck. A (mm)51 mm B (mm)22 mm Weight (g)9.1 g   Harken Part No. 071