"DD" Pew Kneeler Combination BracketSold in pairs3" from center of pin to center of rubber stopped studIncludes 2 identical loose pin bracketsThese are typically usedon frontal screens"D" Brackets are larger versions at 4-1/4""DA+" is an upgraded "D" Bracket with added strengthTypically ships within 48 hoursScrews not includedPlease contact us if you only need left/right side brackets - we carry extensive stock