Weihrauch HW35 piston head, leather seal 30mm and acetal machined insert, also a new threaded insert to fit the original m8 retaining piston stud part. Free P+P to mainland UK PUNCTUM ENGINEERING High quality hand made custom and bespoke air gun parts Our aim is customer satisfaction so if there is any problem with your order please contact us and we will do our best to resolve any issue as swiftly as possible. All items are sent with free second class postage unless otherwise stated