The Allen block fits into the threaded bar on the gooseneck and takes the inhaul nicely and the Harken 405 fits onto the gooseneck of your Europe Mast - some drilling is required for this one.

It contains:

• One Harken 405 16mm Single Air Block with Becket
• One Allen A2020 20mm Single Dynamic block
• Two M3 Nyloc Nut A4
• Two M3 x 40mm Pan Head Machine Screw A4
• One M4 x 20mm Countersunk Machine Screw Pozidrive A4