Nylon double bass strings, made in the USA with a durable design. - Brand: SLAP HAPPY Weed Wackers - Type: Nylon double bass strings - Made in: USA - Color: Transparent tan Regular gauge. Used for less than six months. I think it's been about a year since I took them off. How about these if you want to try nylon strings? I don't think there are any particular problems, but since they are used, please understand that they are non-refundable and non-returnable.