This is the Replacement Screw Set for OS Engines FT-120II and the FT-160. INCLUDES: Two Tubes (aluminum) Length:1/2" Outside Diameter: 5/32" approximately Two Hex nuts Four Cap screws (1/8"x3/4") 3 x 20mm Eight Cap screws (1/8"x3/8") 3 x 10mm Four Cap screws (1/8"x5/8" approximately) 3 x 17mm Four Cap screws (1/8"x5/8") 4 x 16mm Eight Cap screws (1/8"x1/2") 4 x 12mm Six Cap screws (3.32"x5/16") 2 x 6mmOS EnginesPart OSM46013002