Description: 1*20 single row breakaway male header: 1'' spacing Straight through hole Male PCB pin headers 0.025'' square posts Gold flash plating Black insulator 1*20 female receptacle: 1'' spacing Single row mates with 0.025'' square post headers gold plated contacts 1*3 single row breakaway header: 1'' spacing Male PCB pin headers Straight through hole Gold flash plating Black insulator About shipping: These items will be shipped by USPS first class mail with NO tracking number. Usually, it takes about 1-5 business days for the item to reach you.