The Flex Mount (sand needs to be added) is designed for those situations over canvas where one does not want to put a hole in the boat to locate the Gullsweep?. The mount is able to be pulled into location and tied down using the rope loops, without a lot of rope pressure on the canopy, bimini top or roof. Weight 2kg (3 lbs) * Tough & durable canvas construction. * All stainless steel hard ware. * Centre block is 8''x8''x1'' giving ridged flat surface * Ideal for hard flat areas, cabin tops or hard top boats The base needs to be filled with sand which shapes easily over any irregular canvas support members. The important point is to be sure the Gullsweep? centre support pin is vertical to the water. Gullsweep pinCentre pin (shown) is not included with Flex mount because it utilizes the standard pin that comes with a Gullsweep?