Haenim Breastpump Accessories SetInclusive: pump body set, diaphram & valve, air hose, 24mm breastshield, 7oz breast milk storage bottle Recommend to replace the accessories every 3 6 months to maintain good hygiene. Recommend to replace the diaphram & valve when it lossing elasticity or torn, we also suggest to change as frequenly as 1month to maintain its efficiency. Recommend to replace the tubing every 3 6 months, do not wash the tubing, however it is recommend to sterilize in