Is GHS string on Makala MK-C a steel or nylon string?

I want to buy an ukulele and Makala MK-C is reasonable for me. but im afraid that the type of string will affect me. Previously, i bought a guitar with steel string and i had a hard time when playing it and i stop playing the guitar. So, i want to buy an ukulele with nylon string but i dont know whether GHS string is steel or nylon.