Opal Green viola strings are high quality handmade synthetic strings. Their clear warm powerful tone is enhanced by a bright spectrum of overtones similar to gut strings. The set offers good projection without excessive tension;includes: A Kevlar core,/alloy wound and A Steel core/alloy wound. D Kevlar core/silver wound; G Nylon core/silver wound; C Nylon core/tungsten silver wound.
Opal Green Viola Set; Item: OP200
I liked the strings in general, and their sound was comparable to Evah Pirazzis for a lesser price. The strings aren't very stable, however, and go out of tune very easily. They have a decent response and action, but lack the color of the Pirastros.