Bristol Spec 19 Muffler Packing Pillow - 4-Stroke - 19" Universal, easy-to-install design, Pillow can be trimmed to length to fit off-road muffler up to 20" inches long, Lasts 3-5 times longer than traditional packing and extends service to 30-40 engine hours, Resists breakdowns up to 1400?F, Comes with cap stuffer to fill packable end-caps, Adhesive closure flap used to eliminate the need to wrap the packing with tape or wire, Made in the U.S.A.