Hobie Getaway Upper Mainsheet Block Double with becket part # 37900021

This is a new Upper Mainsheet block as used on the Hobie Getaway .  It is Hobie part # 37900021  .  It would work on many other catamarans and is much less expensive than Harken.  I also have the matching bottom block available  It is Hobie part # 379000110  Will handle up to and including 3/8" line.