Cover-Pools PPBNCHNL20X40 Bullnose Coping for Pools up to 20' x 40' - Cover-Pools bullnose vinyl liner coping is a one-piece track channel, vinyl liner retainer, and coping form. Bullnose coping has a rounded, bullnose shape, includes a splice cover to maintain alignment and hide splices, and contains a low track channel profile that requires only one shim. With bullnose vinyl liner coping, you can incorporate 90 degree, 6" or 24″ radius, or chopped (45 degree) corners.