For really heavy duty cleaning jobs, you need a Really Heavy Duty Patch.. Extra Heavy Duty Flannel Glove Cotton. The heavy woven twill side scrubs well, while the fleece side is super absorbent. Same 100 pak really heavy duty patches 7/8" sq super duty patches, pkg size selection, shipping weight and premium quality as our standard Bulk Cleaning Patches. Packaged in bags of 100 or 1000 in a variety of calibers. Per yard, 104 thread count per square inch, flannel glove cotton for durability. No more doubling up on patches when you tackle those really dirty bores. Made from a double thick, soft napped, 100% cotton, Canton flannel to hold more solvent and absorb more fouling without using heavy duty patches #4 hd 2 1/2" square patches, pkg twice as many patches. Strips are 7/8" x 6" for custom cuts to fit specific cleaning needs and are ideal for loop style tips. Extra tough patch that is fleeced on one side, natural on the other to get into the cracks and crevices where dirt hides.