2" Shur-Lock II HDPE Couplings by Duraline. Features include: 2" SDR, 2.375" 2.375" +/- .020" 1.335"; one person installation; re-enterable; air and water tight; no I.D. reduction; excellent pull-out strength on HDPE, PVC, FRP and steel; No-Stop version available for confined areas or repairs; not recommended for plow chute. (Description and features sourced from distributor product pages: Chapman Electric and North Coast.)