1/4OD by 1/8NPTF female adapter pushfit plastic fitting for the connection of plastic or copper tube. NSF 51 and NSF 61 listed. Designed, manufactured and assembled in the UK by John Guest Speedfit. Connectors use a grip then seal collet arrangement. Simply push the fitting fully onto the tube. Should the need arise to demount the connection push the collet towards the body of the fitting and pull the tube to release. The fitting ensures an easier working environment in confined spaces and removes the need for tools (no torches, crimpers or glues). 12 month guarantee against any defect in material or manufacture.