멸균백 B00990 NASCO Whirl-Pak 12.5 x 30.5cm (500ea) 멸균백 B00990 NASCO Whirl-Pak 12.5 x 30.5cm (500ea) 멸균백 B00990 NASCO Whirl-Pak 12.5 x 30.5cm (500ea)