Single Layer Capacitors AVX offers a complete line of Single Layer Ceramic (SLC) Capacitors with dielectric constants ranging from 14 (NP0) to greater than 30,000 (X7R). Product offerings include standard SLC’s (with & without borders) in all dielectric families. SLC’s with double-sided borders are now available in most dielectrics. In addition to an extensive offering of standard catalog devices, custom designs (and prototypes) are available upon request. Delivery of samples seldom exceeds two weeks once design parameters have been established.