McMaster 9662K44 Compression Spring Stock, Spring Steel, 36" Long, 0.75" OD, 0.59" ID 10K3340200V letting you reach out of the way fasteners letting you reach out of the way fasteners this canister fan provides effective air circulation to ensure the safety and comfort of workers 3 lbf in End Type Open Compression Spring Type Straight Maximum Temperature 250° F Performance Cut to Length Spring Type Compression System of Measurement Inch Temper Rating Spring Pack Size 1 Country of Origin United States DFARS Compliance Specialty Metals COTS Exempt ECCN EAR99 Schedule B Number 732020 Their open ends make cutting easier but prevent them from standing on their own