Aftco Guides Heavy Duty roller guides - with ample room for heavy lines and large knots - are ideal for big game trolling and deep water rods rated for 20 to 80-lb. lines, and for stand-up style tuna rods up to a 130-lb. test rating. Aflon, an exclusive Teflon formulation, is bonded to all bearings to provide lasting lubrication and protection. Aftco's Heavy Duty roller guides feature feet that are precisely formed to match the contours of the blank and grip the rod with exceptional strength. The edges are feathered to allow winding thread to climb over the feet easily. Standard roller tip-tops are the perfect match for this guide series.