Pacer with mask for child [srphc82337065-spacer with mask for children.1)it should be suitable for use for infants and children.2)the minimum capacity of the holding chamber should be approximately 250cc(ml).3)the holding chamber should have a valve to prevent rebreathing of the exhaled air.4)should be made of polymer /polycarbonated material.5)should have a mask of pediatric size suitable for covering the nose and mouth of the infant and children.6)should be compatible with the mdi which is b