DURA LIFE E Coat .243 x 2 x 33 Torsion Spring & 18" Winding Rods Platform 16 Foot Box Contents Fasteners 10 DLTBR17528B 16 Foot Box Contents Fasteners 10 x 13 Ball Nylon Rollers 90 x Self Tapping Screws (7 16" 20tpi x 1") 11 x #1 Hinges 20 x Lag Screws (7 16" x 2" HH) 2 x #2 Hinges 16 x Carriage Nuts Bolts (1 4" 20tpi x 5 8") 2 x #3 Hinges 12 x Tap Nuts Bolts (5 16" 7 16 head x 1") 2 x Top Brackets 6 x Carriage Nuts Bolts (3 8" 16tpi x 1") 2 x Bottom Brackets 4 x Lag Screws (7 16" x 2 The DURA LIFT Ultra Life Max roller features a 3" nylon wheel with a 7" stem and a dual caged 6201ZZ bearing with protective front and rear covering Upgrade your garage door setup with the DURA LIFT Garage Door Torsion Spring Bundle 243 Garage Door Torsion Springs (Green) offer corrosion resistance and a simple installation process to quickly replace old springs