161 1.5″ Ball System ArmsFeatures:Engineering-grade nylon and stainless steel constructionCompatible with all 1.5 Scotty ball system accessoriesThe multi-hole top plate fits most popular electronics brandsUV-resistant engineering-grade nylon constructionCorrosion-resistant stainless steel hardware1.5 ball joints allow for 360 degrees of rotation and 180 degrees of tilt at both ends2-1/4 square fixed baseFor 7-9 fish findersHolds your device securely in extreme conditionsEasy grip T-knob for loosening or tighteningDesigned for 1/4 fasteners (sold separately) Specifications:Type: Mounting BracketsBox Dimensions: 2″H x 5″W x 10″L WT: 0.4 lbsUPC: 062017001616