PROMEVET Pet Anaesthesia Mask Set - 6 Sizes for Dogs or Cats or Various Animals - Portable Anaesthesia Oxygen Mask Used by Veterinary. 【Features】 Anaesthesia oxygen mask set with 6 sizes and transport box. Suitable for small-to-medium animals, such as dogs, cats, birds, pigs, rabbits, mice etc. Can be used for animal anesthesia, oxygen inhalation, nebulization, first aid etc. 【Specification】 Transparent PVC masks with soft black silicone diaphragm. Total 6 masks are available in the set: #1 44*41mm, #2 57*50mm, #3 60*65mm, #4 87*95mm, #5 110*116mm, #6 130*140mm. 【Use Instruction】 Choose a proper size mask for the treated animal - Check the intact of the mask - Use connector to connect mask to the breathing circuit or resuscitation device - Place the mask on the treated animal's snout, hand-holding or use the strap to fix the mask at a tight and comfortable position - Adjust the mask during the treatment to ensure minimal air leakage.