The rubber Frustration is a very popular long-pimple covering, which offers extra grip and thus serves a wide range of bump-out strategies. The result is empty balls without rotation. With good wrist use, these can be answered with a surprising cut. The regular long pimple effect against topspins is still produced as usual. Available in red or black, OX / 1.0 / 1.5 or 2.0 mm.