LEGO Reddish Brown Cone 1 x 1 with Top Groove has been used in at least 240 LEGO sets over the past 18 years, since it was first used in 2006. You can also find this part in at least 81 other colours. It has a design ID of 59900 which can usually be found molded into the bottom of the part.
LEGO Transparent Red Cone 1 x 1 with Top Groove (28701 / 59900)
10PCS 59900 Cone 1x1 Top Groove 4589 6188 Brick Parts Building Blocks Accessories Assemble Replaceble Changeover Particle Toy
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LEGO 5 NEW Red Cones 2 x 2 x 2 Open Stud Parts $1.65 - PicClick AU
LEGO Cone 1 x 1 with Top Groove (28701 / 59900)
Cones - LEGO® Cone 1x1 with Top Groove - The shop Briques Passion
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LEGO Reddish Brown Cone 1 x 1 with Top Groove (28701 / 59900)
Cone 1 x 1 with Top Groove : Part 4589b
LEGO Parts - Reddish Brown Cone 1 x 1 w Top Groove - No 4589b - QTY 5
Cone 1 x 1 with Top Groove : Part 4589b
LEGO The Lord of the Rings: Rivendell Set 10316 Inventory
Lego® 64288 Cone Brick 1x1 with Top Groove (trans-light blue)
Lego® 59900, 4589b, 64288, 28701, 6139460, 6172241, 6337639 cone 1x1