Burris 30mm Height One Ring (1/4-Inch Low) Burris XTR Tactical Quick Detach Rings 30mm Medium 1/2" Height 1 Pair Matte Black Ready for the he Wide 6-screw ring is combined w/lightweight yet thick cross section aluminum to provide a reliable Specifications and Features: - 30mm Medium Rings - 1/2" High - 1 Pair per order - Quick Detac