SI (sponge insert)Removable pre-cut foam insert enabling precision customization of the case's interior plus egg crate foam in the lid for full, shock resistant protection.- case shells made of polypropylene- automatic air pressure compensation valve- transparent name plate- 2 latches- 1 padded handle- temperatures ranging from -40° up to +80° C- very sturdy, stackable- dustproof, watertight- 30 years guarantee- black name plate (optional)- carrying strap (item no. CS/500), lid pocket (item no. LP/1000) and panel frame (item no. PF/1000) possible