Inmunotek has a broad catalogue of allergens for skin prick testing:

• Grass pollens
• Weed and bush pollens
• Tree pollens
• Mites
• Fungi
• Epithelia
• Insects
• Foods
• Positive (histamine) and negative controls

They are supplied sterile in 2,5 mL droppers.  Skin prick test allergens are available individually or grouped in allergen sets made on demand.