A delivery device for delivering an object to a targeted location within a human subject, the delivery device having a portion configured for insertion into an instrument channel of an endoscope, the delivery device comprising: a. a body having a first passage therethrough; b. a flexible elongated tube having a first end and a second end, said first end being proximal with and fixed to said body and said second end being distal from said body, said flexible tube being configured for insertion into said instrument channel of said endoscope and for defining a second passage aligned with said first passage of said body; c. a cable having a first end and a second end, said cable being slidably engaged within said first passage and said second passage concurrently; d. a handle (14, 16, 18) fixed to said first end of said cable, said handle (14, 16, 18) being movable relative to said body; and e. a retention unit (32; 60; 64; 68; 70; 80; 90; 100; 307) connected to said second end of said flexible tube, wherein said retention unit (32; 60; 64; 68; 70; 80; 90; 100) has a cylindrical-shape with at least a first end removably connected to said second end of said flexible tube and a second end defining an opening, said first end being configured to receive said second end of said cable; and wherein the delivery device is configured so that relative movement of said handle (14, 16, 18) with respect to said body in a direction towards said retention unit (32; 60; 64; 68; 70; 80; 90; 100) creates distal movement of said cable to extend said second end thereof beyond said second end of said flexible tube and into said first end of said retention unit (32; 60; 64; 68; 70; 80; 90; 100) thereby expelling said object from said retention unit (32; 60; 64; 68; 70; 80; 90; 100) to said targeted location when said flexible elongated tube and said retention unit (32; 60; 64; 68; 70; 80; 90; 100) extend distally from said instrument channel of said endoscope. the delivery device characterised in that the retention unit is configured to apply a mechanical retention force to retain said object during delivery to said targeted location, and in that said first end of the retention unit is dome shaped. a. a body having a first passage therethrough; b. a flexible elongated tube having a first end and a second end, said first end being proximal with and fixed to said body and said second end being distal from said body, said flexible tube being configured for insertion into said instrument channel of said endoscope and for defining a second passage aligned with said first passage of said body; c. a cable having a first end and a second end, said cable being slidably engaged within said first passage and said second passage concurrently; d. a handle (14, 16, 18) fixed to said first end of said cable, said handle (14, 16, 18) being movable relative to said body; and e. a retention unit (32; 60; 64; 68; 70; 80; 90; 100; 307) connected to said second end of said flexible tube, wherein said retention unit (32; 60; 64; 68; 70; 80; 90; 100) has a cylindrical-shape with at least a first end removably connected to said second end of said flexible tube and a second end defining an opening, said first end being configured to receive said second end of said cable; and wherein the delivery device is configured so that relative movement of said handle (14, 16, 18) with respect to said body in a direction towards said retention unit (32; 60; 64; 68; 70; 80; 90; 100) creates distal movement of said cable to extend said second end thereof beyond said second end of said flexible tube and into said first end of said retention unit (32; 60; 64; 68; 70; 80; 90; 100) thereby expelling said object from said retention unit (32; 60; 64; 68; 70; 80; 90; 100) to said targeted location when said flexible elongated tube and said retention unit (32; 60; 64; 68; 70; 80; 90; 100) extend distally from said instrument channel of said endoscope.