dia. 2 1/4" 1 ply/dia. 3 1/8" 1 ply/3 1/4" x 3 1/4" 2 ply/4 1/4" x 4 1/4" 2 ply/5 1/4" x 5 1/4" 2 ply bias-ply repair patch 5 pcs each packed in a box. Grey vulcanizing gum, blue poly backing suitable for injury size less than 3/8" for 24 ply tire, 1/2" for 16 ply tire, 3/4" for 14 ply tire, 1" for 12 ply tire and 1 1/2" for 8 ply tire. For chemical vulcanization or in low temperature systems. It will be better to use with special glue “Rubber Cement” for tire repair. Note: the glue are not included in the package Each reinforcing ply is prtected and encased in a molded ply package making each patch strong while remaining flexible Bias-ply repair patches are designed for use in nailhole, reinforcing, or section repairs and can be applied in any repairable area of a tube or tubeless bias ply tire ZERINT TP-M85B USA-Style Heavy-Duty Bias-Ply Repair Patch Kit 25 pcs