Our keyhole pinless white plastic jump cups are made from a super tough nylon. Can be flipped over to the flat side for a gate or plank.  Work with most keyhole tracks in use today. Sold individually in three depths: 1.5″ (38 mm), 1″ (25 mm), and 3/4″ (20 mm). Meeting the depth requirements of USEF for hunter/jumper and equitation.