Bushman Panoramic offer a choice of 300 or 400g  counterweight with 1/4"Male to Female adapters.  They are intended to increase the stability of a Monopod and camera system by lowering its centre of gravity thus making it much less likely to fall over.  Simply screw the counterweight directly on to a small tripod using the 1/4"UNC Female connection on the bottom of the counterweight, then attach the Monopod to the 1/4"UNC Male thread on top.  Bushman Monopods include a counterweight; add more for increased stability. IN STOCK