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CombiMatrix offers three kinds of platforms according to the size of probes on a chip, 4x2K, 12K, and 90K. CombiMatrix chips also have multiple areas of application including expression chips, SNP genotyping, re-sequencing, and comparative hybridization using array CGH principle.
CustomArrayTM specifications

Product Offering: 90K - 90,000 user definable probes
....................12K - 12,000 user definable probes
....................4x2K - four sections of 2,240 user definable
Capture Oligonucleotides: 35-40mers (up to 50mers)
Feature size: 44um
Sensitivity: 1.5 pM or better
Reproducibility: Correlation coefficients(r2) 0.97-0.99

Format:1”x3” standard slide format
 
Combimatrix offers series of pre-designed chips for specifically targeted applications in various organisms. If you find CatalogArray™ fit your research needs, you can start experiment without probe design process.
CatalogArray Complete Fungal Genomes

HIV- Human (12K)
Human Cancer (4x2K)
Human Cancer Marker (12K)
Human Cell Cycle (12K)
Human Inflammation (12K)
Human Ion Channel (12K)
Human Metabolism (12K)
Human Stress (12K)
Human Toxicology (12K)
Human Toxicology (4x2K)
Mouse Cancer Marker (12K)
Mouse Cell Cycle (12K)
Mouse Inflammation (12K)
Mouse Metabolism (12K)
Mouse Toxicology (12K)
Mouse Toxicology (4x2K)
Rat Neuroscience (12K)
Rat Cancer marker (12K)
Rat Cell Cycle (12K)
Rat Inflammation (12K)
Rat Metabolism (12K)
Rat Toxicology (12K)
Rat Toxicology (4x2K)
Malaria (12K)
Canine 1 (12K)
Canine 2 (12K)
Canine 3 (12K)
Medaka Fish 1
Medaka Fish 2
Silk Worm- Bombyx mori (12K)
Cotton (12K)
E. coli K12 (12K)
Nostoc PCC7120 (12K)

Ashbya gossypii (12K)
Candida albicans (12K)
Cryptococcus neoformans (12K)
Magnaporthe grisea (12K)
Neurospora crassa (12K)
Saccharomyces cerevisiae (12K)
Schizosaccharomyces pombe (12K)
Combimatrix MicroRNA chips are designed based on Sanger DB on 4x2K format slides. MicroRNA CatalogArray™ list is as follows.
  Species Specific MicroRNA Genus Species Micro RNAProbes Controls
Human Homo sapiens 485 12
Mouse Mus musculus 400 12
Mouse/Rat Mus musculus/Rattus norvegicus 400 17
Rat Rattus norvegicus 400 12
C. elegans Caenorhabditis elegans/ Caenorhabditis briggsae 153 9
Drosophila Drosophila melanogaster/ Drosophila psuedoobscrua 95 9
Arabidopsis Arabidopsis thaliana 239 9
Maize Zea mays 239 9
Designs are based on unique microRNA species from current release of Sanger database
  (Version 9.0 is at http://microrna.sanger.ac.uk/sequences/)
Hairpin sequences are excluded from the design process
Probes are anti-sense to mature microRNA
For each probe, a double mismatch control is included to ensure specificity of detection.
  These ‘2mut’ controls are designed to maximally de-stabilize probe-target hybridization, thus,
  mutations are introduced in the two most stable triplets.
Non-microRNA controls include positive controls corresponding to small RNA such as tRNA
  and U6. The small RNA co-isolate with microRNA if the target preparation protocol is based on
  size fractionation.
The negative controls contain anti-sense probes designed for abundant mRNA (such as Actb
  (actin), HSPA4, PGK1). If target samples have some RNA degradation, the partially digested
  fragments of the abundant mRNA will co-isolate with microRNA during size fractionation, and
  the corresponding probes will produce high intensity signals. If target samples are of good
  quality, the negative control signals will stay low.
MicroRNA Microarrays are compatible with common reagents and scanners
All probes on every microRNA are 100% quality tested