Prices are different of different models. Tell us the model, get exact price.
The KYH series slip rings have 4 sizes of through bore 1/2''(12.7mm); 1''(25.4mm); 1.5''(38.1mm); 1.97''(50mm).
It's easy to find out model you need:
1), Inner bore size.
2), Number of circuits,
3), Current and voltage,
4), Rotary speed
4), Ingress protection (IP54 standard, IP65 or higher available)