Classy material: The heating elements are made of nickel chromium, featuring high resistivity, low resistance temperature coefficient, high-temperature usability, good high-temperature corrosion resistance, fast heating, durability, and resistance to breakage. Easy to operate: Installation requires only a screwdriver on most machines. Replace old elements to improve bag sealing performance during daily use. Replace the kit when the PTFE cloth shows discoloration or reduced sealing effectiveness. Appropriate size for use—please verify dimensions carefully before purchase. Compatible with most machines whose model numbers include “400”, such as F-400, FS-400, and PFS-400. Compatible with most machines whose model numbers include “200”, such as F-200, FS-200, and PFS-200. Type: 400 Type / 200 Type Color: Silver Material: Nickel chromium Size: 455 x 2 mm / 240 x 2 mm Package Contents: 10 x impulse sealer heating elements 10 x corresponding cloth tapes Note: Color may vary slightly due to lighting and screen settings. Measurement tolerance is ±1–3 cm.