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/0# 1"( 1 2 ,-. /0# 3 0& 4 567& % 57 1 8 ,-409 *:" ;<" Description Part Number S-Hook 91907302 Tube/Reflector Hanger 03090100 Total Straight Length (both sides) or Length from U-Tube to U-Tube in a Double "U" Layout Typical Expansion Each Side Minimum “X” Length 0’ - 50’ ±1” (3 cm) 12” (31 cm) 51’ - 60’ ±2” (5 cm) 18” (46 cm) 61’ - 80’ ±3” (8 cm) 24” (61 cm) 81’ - 100’ ±4” (10 cm) 30" (76 cm) 101’ - 120’ ±5” (13 cm) 36" (91 cm) 121’ - 140’ ±6” (15 cm) 42" (107 cm) 141’ - 160’ ±7” (18 c