Check the listing for details. Loon Biostrike. Condition: New. Listed at 8.50 USD. A putty indicator that makes adjusting the depth and size of indicator simple. Beyond that, it is reusable, biodegradable, and environmentally friendly. BioStrike can be rolled in a ball with wet fingers and applied anywhere on a leader, then removed and placed back in the container.FEATURES:Putty strike indicatorEasily create indicator to your desired sizeUse with small dry flies to increase visibilityReusableBiodegradableDIRECTIONS FOR USE:Wet fingers and remove Biostrike from container; the amount depends on the weight of the flies being fished. Roll Biostrike into a football shape and apply to leader at desired depth. After fishing for the day, remove Biostrike from leader and return to container.Visit our eBay Store: Blue Wing Olive. Flat Rate Shipping! Only pay shipping on first item from our eBay Store BWO FLY. Add additional items for NO ADDITIONAL SHIPPING charge.