... heat pack,hand warmer heating pad environmental,non-toxic 18hours of warmth Cusomer brand printing CE hand warmer with iron powder,heat pack,heating ... padsize: 13x9.8cm(+/-3mm)heat: 18hourspacking: 1pcs/plolybag ,200pcs/carton Contents ... 3. Shake lightly two or three times to generate heat. Caution1. Do not apply directly against skin as burns ...