It's a nylon, woven hook reclosable fastener with 3.8 mm engaged thickness, and is plain backed for sew on applications. It mates with SJ3418FR. Sew on 3M™ Fastener SJ3419FR Hook Flame Resistant to easily replace zippers, buttons, snaps and laces.

These plain backed, nylon, hook and loop fasteners have flame resistant, pressure sensitive adhesive and are designed for use with applications that require flame resistant properties. They are rigorously tested, making them durable for thousands of closures and are temperature resistant up to 121°C.

Features:

• Resist flames up to 121°C
• Get thousands of closures for each fastener
• Replaces zippers, buttons, snaps and laces
• Affix, splice, assemble and much more
• Remove cleanly from stainless steel, anodised aluminium and glass after use in high temperatures