This is a ready made buoy float for lobster or crab hoop net fishing.
Large style for heavy weathet
It has a weight sealed inside near the hook.
The Hook adds to the weight so the buoy tends to hold the strobe end upright but the overall position depends on wind and current. Extra weight can be added by the user if so desired.
The strobe is flashing bright white and has an internal sensor that turns the strobe on only in dark condition. If you would like the strobe to flash in another color (blue, red or green), please leave a note. 
The range of the strobe at night is up to 1 mile and with two AA batteries the strobe will function up to a full week. 
The buoy also has a band of reflective tape for additional safety and the body of the buoy can be used for marking buoy number or letter and go-id. 
Usually every buoy is made to order. Sometimes we would have some in stock. 
Due to all kinds of reasons, the yellow bullet shape buoys we use might not be exact the same from time to time. The slight variance in appearance cannot be used as the reason to return and we reserve the right to proceed the order without informing the customer.  But every customer would be informed immediately if we have to make big changes of the appearance (like changing the color of the buoy from yellow to orange).