CENTERLINE 220 GUIDANCE SYSTEM Go to amazon.com Related posts Top 10 best centerline rotor for 2022 Top 7 best centerline systems for 2022 FeaturePlease read descriptions carefully before ordering. Description878-9002399. CENTERLINE 220 GUIDANCE SYSTEM. Suction cup part Number 65-05112 , Ball on suction cup part Number 65-05125. STD QTY: 1.