A system [2, 99] for delivering flowable biomaterial into an intervertebral disc space between an upper vertebral body and a lower vertebral body of a patient, the system comprising: a plurality of delivery bodies each configured for delivering the biomaterial, each of the plurality of delivery bodies defining: a proximal end, an elongate outer surface extending from the proximal end to a distal end spaced from the proximal end along a longitudinal direction,, a mounting formation at the proximal end, the mounting formation configured to receive a handle component, a cannulation opposite the outer surface along a radial direction, the cannulation extending from the proximal end to at least one opening adjacent the distal end; a distal region including a tip that extends to the distal end, the distal region defining a maximum height at a location proximally spaced from the distal end, the maximum height measured along a second direction perpendicular to the longitudinal direction, wherein the maximum heights of at least some of the distal regions of the plurality of delivery bodies are different from one another, and the distal regions are configured to provide feedback indicating a distance between the upper and lower vertebral bodies [3a, 3b] along a cranial-caudal direction {C-C]; a carrier that defines a channel elongate along the longitudinal direction, the carrier configured for insertion within the cannulation from the proximal end of any of the plurality of delivery bodies to carry the biomaterial within the cannulation; and an advancement member configured for insertion within the cannulation of any of the plurality of delivery bodies so as to forcibly advance the biomaterial from the cannulation, through the at least one opening, and into the interverbal disc space. a plurality of delivery bodies each configured for delivering the biomaterial, each of the plurality of delivery bodies defining: a proximal end, an elongate outer surface extending from the proximal end to a distal end spaced from the proximal end along a longitudinal direction,, a mounting formation at the proximal end, the mounting formation configured to receive a handle component, a cannulation opposite the outer surface along a radial direction, the cannulation extending from the proximal end to at least one opening adjacent the distal end; a distal region including a tip that extends to the distal end, the distal region defining a maximum height at a location proximally spaced from the distal end, the maximum height measured along a second direction perpendicular to the longitudinal direction, wherein the maximum heights of at least some of the distal regions of the plurality of delivery bodies are different from one another, and the distal regions are configured to provide feedback indicating a distance between the upper and lower vertebral bodies [3a, 3b] along a cranial-caudal direction {C-C]; a proximal end, an elongate outer surface extending from the proximal end to a distal end spaced from the proximal end along a longitudinal direction,, a mounting formation at the proximal end, the mounting formation configured to receive a handle component, a cannulation opposite the outer surface along a radial direction, the cannulation extending from the proximal end to at least one opening adjacent the distal end; a distal region including a tip that extends to the distal end, the distal region defining a maximum height at a location proximally spaced from the distal end, the maximum height measured along a second direction perpendicular to the longitudinal direction, wherein the maximum heights of at least some of the distal regions of the plurality of delivery bodies are different from one another, and the distal regions are configured to provide feedback indicating a distance between the upper and lower vertebral bodies [3a, 3b] along a cranial-caudal direction {C-C]; a carrier that defines a channel elongate along the longitudinal direction, the carrier configured for insertion within the cannulation from the proximal end of any of the plurality of delivery bodies to carry the biomaterial within the cannulation; and an advancement member configured for insertion within the cannulation of any of the plurality of delivery bodies so as to forcibly advance the biomaterial from the cannulation, through the at least one opening, and into the interverbal disc space.