Modular Sprue w/ 2 sets of vertical runners (both with gates and without). 5mm in diameter throughout except where mentioned. 3mm cold well plugs on runner ends. VErtical runners have 3mm in diameter x 2mm in height male tips that plug into the femal ports on the horizontal main sprue body. Horizontal runners are 21mm long (total 47mm width. from left to right) Vertical runners are 21mm long w/ 4mm diameter gates (3mm long) tipped w/ 1mm diameter x 2mm long extensions on one pair to connect to your part intended for molding.