From Phoenix Contact a series of sealing plugs and protective covers for panel mounting frames and contact inserts. The protection devices are made from durable plastic and have a protection class of IP65/67.
Part number 921-0124 - sealing plug for push-pull panel frame - push pull locking
Part number 921-0133 & 136-0419 - protective cover for contact insert - push pull locking
Part number 921-0155 - protective cover for contact insert - no locking
Part number 921-0180 - protective cover for contact insert - no locking (flat design)